A) The frictional force can be calculated as: 177.18 N.
B) The acceleration of the car is 0.197 m/s^2.
C) It takes approximately 15.23 seconds for the car to come to a complete stop.
Assuming that the coefficient of friction between the tires and the water is approximately 0.02, the frictional force between the tires and the water can be calculated as follows:
Frictional force = coefficient of friction * contact area * pressure
The pressure can be calculated as the weight of the car divided by the contact area:
Pressure = weight / contact area = (900 kg * 9.81 m/s^2) / 0.4 m^2 = 22,147.5 Pa
Therefore, the frictional force can be calculated as:
Frictional force = 0.02 * 0.4 m^2 * 22,147.5 Pa = 177.18 N
The acceleration of the car can be calculated using Newton's second law:
Net force = mass * acceleration
The net force acting on the car is the frictional force, since the wheels are locked and there is no other external force acting on the car. Therefore:
Frictional force = mass * acceleration
Acceleration = Frictional force / mass = 177.18 N / 900 kg = 0.197 m/s^2
The time it takes for the car to come to a complete stop can be calculated using the kinematic equation:
Vf^2 = Vi^2 + 2 * acceleration * distance
where Vf is the final velocity (0 m/s), Vi is the initial velocity (15 m/s), and distance is the distance the car travels before coming to a stop. Solving for distance:
distance = (Vf^2 - Vi^2) / (2 * acceleration) = (0 m/s - (15 m/s))^2 / (2 * 0.197 m/s^2) = 114.22 m
The time it takes for the car to travel this distance can be calculated using the kinematic equation:
distance = (Vi + Vf) / 2 * time
Solving for time:
time = 2 * distance / (Vi + Vf) = 2 * 114.22 m / (15 m/s + 0 m/s) = 15.23 s
Therefore, it takes approximately 15.23 seconds for the car to come to a complete stop.
The given question is incomplete, the complete question is
A car of mass 900 kg is driving along a horizontal road at 15 m/s when the brakes are applied and the wheels lock. The car glides on a thin 0. 003 mm layer of water with a contact area of 0. 4 m2. Calculate
the following:
A) The frictional force between the tires and the water.
B) The acceleration of the car.
C) The time it takes for the car to come to a complete stop.
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Which one of the following values is the smallest possible amount of free charge that has been discovered? A. 1.6 X 10-19 coulombs B. 6.63 x 10-34 coulombs C. 1.38 x 10-23 coulombs D. 5.34 x 10-20 coulombs E. 8.85 x 10-12 coulombs
Among the answer choices provided, correct option is (A) which means smallest charge is [tex]1.6 * 10^(-19)[/tex] coulombs.
Charge is a fundamental property of matter and is quantized, which means it can only exist in discrete amounts, rather than being continuous. The smallest unit of charge is the charge of an electron, which has a magnitude of [tex]1.602 * 10^(-19)[/tex] coulombs. This value is given in option (A).
Option (B) [tex]6.63 * 10^(-34)[/tex] coulombs is not a valid value for charge since it is in the range of Planck's constant, which is a fundamental constant in quantum mechanics.
Option (C) [tex]1.38 * 10^(-23)[/tex] coulombs is the value of the Boltzmann constant, which is related to the average kinetic energy of particles in a gas.
Option (D) [tex]5.34 * 10^(-20)[/tex] coulombs and option
(E) [tex]8.85 * 10^(-12)[/tex]coulombs are not valid values for the smallest unit of charge, as they are not within the range of any known physical constant or value.
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how to convert 27 as a decimal?
All you have to do to convert 27 to a decimal is divide it by 100.
One of the number types in algebra that has a whole integer and a fractional portion separated by a decimal point is a decimal. The decimal point is the dot that appears between the parts of a whole number and a fraction. An example of a decimal number is 34.5.
The square root of the perfect square number 100, which is 10, is 10. Since 100% represents a full number, 100 is used as the basis for percentages. One dollar is divided into 100 cents.
100 is not a prime. One hundred is divisible by 1, 2, 4, 5, 10, 20, 25, and one hundred. 100 is not a prime number because it has more than two factors, including 1, 2, 4, 5, 10, 20, 25, 50, and 100.
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if a photon has the wavelength of 250 nm, what region of the em spectrum would it fall within?
A photon with a wavelength of 250 nm falls within the ultraviolet (UV) region of the electromagnetic (EM) spectrum.
The EM spectrum ranges from high-energy gamma rays with very short wavelengths to low-energy radio waves with very long wavelengths. In between, there are various regions including X-rays, ultraviolet, visible light, infrared, and microwave.
The UV region is the region of the EM spectrum that has shorter wavelengths and higher energies than visible light. It is located between the visible and X-ray regions and is divided into three subregions: UV-A (320-400 nm), UV-B (280-320 nm), and UV-C (100-280 nm). A photon with a wavelength of 250 nm falls within the UV-C region, which has the shortest wavelengths and the highest energy photons within the UV region.
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How do you read a ruler in CM?
To read a ruler in cm, locate the zero mark on the ruler, then read the measurement where the object being measured ends, aligning the end of the object with the appropriate line on the ruler, and counting the number of centimeters to that line.
When reading a ruler in cm, it is important to identify the zero mark on the ruler and align it with the beginning of the object being measured. Then, locate the end of the object and align it with the appropriate line on the ruler, counting the number of centimeters to that line.
Each centimeter on the ruler is divided into 10 smaller units called millimeters, so it is also possible to measure to the nearest millimeter by identifying the smallest line on the ruler that aligns with the end of the object.
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A ball with an initial speed of 4.0 m/s undergoes constant acceleration at 3.0 m/s² for 5.0 s. What is the total distance traveled by the ball during this 5.0-s period?
A 38 m
B 58 m
C 75 m
D 95 m
Insolation directly results in changes in the ________of a gas, which then results in changes in pressure, leading to motion in the atmosphere. temperature.
Insolation results in changes in the temperature of a gas, which then results in changes in pressure, leading to motion in the atmosphere.
When insolation heats up the Earth's surface, it causes the air in contact with it to warm up through conduction. The heated air then expands and becomes less dense, which makes it rise and creates an area of low pressure at the surface. Conversely, areas that receive less insolation will be cooler, and the air in those regions will be denser, leading to higher surface pressure.
As the pressure in one area changes due to differences in temperature, it creates a pressure gradient that leads to motion in the atmosphere. Air will flow from areas of high pressure to areas of low pressure, creating wind and atmospheric circulation patterns. These pressure differences can also lead to the formation of weather systems, such as cyclones and anticyclones, which can affect large regions of the atmosphere.
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Which change will occur in a system with increasing entropy?
A. Thermal energy will increase.
B. Mechanical energy will increase.
c. Elastic potential energy will decrease.
D. Gravitational potential energy will decrease.
Thermal Energy will increase. This change will occur in a system with increasing entropy.
Entropy:
Entropy is a measure used to determine how chaotic or random a system is. It is a state function in thermodynamics that specifies how energy is distributed and how much energy is available to do meaningful work. As entropy tends to increase over time, the energy available to do work decreases. According to the second law of thermodynamics, the overall entropy of a closed system does not decrease, which means that energy tends to spread out and become more disordered. Many fields of science, such as chemistry, physics, and biology, as well as many practical applications, such as energy conversion, information theory, and materials science, rely on an understanding of entropy.
Thermal Energy:
The term "thermal energy" is used loosely in various contexts in physics and engineering. It can refer to several different well-defined physical concepts. These include the internal energy or enthalpy of matter and radiation; heat, defined as a transfer of energy (such as thermodynamic work); and clean energy of a certain type. Every object or substance has thermal energy - the sun is the greatest source of thermal energy in our solar system. Heat is the transfer of energy from one object or substance to another, that is, a flow of thermal energy.
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The equation of motion of a simple harmonic oscillator is d2x/dt2=9x, where x is displacement and t is time. Find the period of oscillation.
The time period of oscillation is 2.09 units.
The equation of motion for a simple harmonic oscillator is given by:
[tex]\frac{d^2x}{dt^2} + (\omega^2)x = 0,[/tex]
The time period of a periodic motion is the time required for one complete cycle of the motion. In other words, it is the time interval between two successive identical points in the motion.
where x is displacement, t is time, and ω is the angular frequency of the oscillator.
Comparing this equation to the given equation, we can see that [tex]\omega^2[/tex] = 9, so ω = 3. The period T of the oscillation is given by:
T = 2π/ω
Substituting the value of ω, we get:
T = 2π/3
T = 2 (3.14)/3
T = 2.09
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Rank the following events in the order that corresponds to the formation of a planetary system.1. Gravity collapses a cloud of interstellar gas2. A rotating disk forms & dust grains stick together by static electricity3. Small bodies collide to form larger bodies4. Primary atmospheres form5. A stellar wind "turns on" and sweeps away gas and dust, removing primary atmopsheres from planets6. Secondary atmospheres form
From the given data, the correct ranking of events in the order of formation of a planetary system is 1, 2, 3, 4, 5, 6.
The events that lead to the formation of a planetary system are not completely understood, but current theories suggest the following sequence:
Gravity collapses a cloud of interstellar gas, which begins to rotate due to conservation of angular momentum.
As the cloud collapses, it forms a rotating disk called a protoplanetary disk. Dust grains in the disk stick together by static electricity to form planetesimals.
Planetesimals collide and merge to form larger bodies called protoplanets.
As protoplanets grow in size, they begin to gravitationally attract gas from the protoplanetary disk, forming primary atmospheres.
A stellar wind from the forming star may "turn on" and sweep away gas and dust from the protoplanetary disk, removing some of the primary atmospheres from planets.
After the stellar wind dissipates, the protoplanetary disk becomes depleted of gas and dust, and protoplanets continue to grow by accreting planetesimals and other protoplanets. As protoplanets grow larger, they may develop secondary atmospheres from volcanic outgassing, comet impacts, or other processes.
So, the correct sequence of events is:
1. Gravity collapses a cloud of the interstellar gas
2. A rotating disk forms and dust grains get stick together by static electricity
3. Small bodies collide to form larger bodies
4. Primary atmospheres form
5. A stellar wind "turns on" and sweeps away the gas and dust, removing the primary atmospheres from planets
6. Secondary atmospheres form
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Two skaters stand facing each other. One skater's mass is 60 kg, and the other's mass is 72 kg. If the skaters push away from each other without spinning, what happens?
When two skaters with mass push away from each other without spinning they move away equal and opposite velocities as per law of conservation of momentum
This means that the momentum of the system before the push is equal to the momentum after the push.
Assuming that the initial velocity of the skaters is zero, the total initial momentum of the system is zero. When they push away from each other, the momentum of the first skater will be equal and opposite to the momentum of the second skater. This means that the first skater will move away from the second skater with a certain velocity, while the second skater moves away from the first skater with an equal and opposite velocity.
The magnitude of the velocities of the skaters will depend on their masses and the force applied during the push. Since the second skater has a greater mass than the first skater, their velocity will be smaller but still in the opposite direction. Overall, the skaters will move away from each other without spinning, and the total momentum of the system will be conserved.
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Why do different atoms have different lines in their spectra?A. different elements have different energy levels for the electronsB. light from a continuous spectrum source passing through a cooler low-density gasC. an eruption of solar material from the photosphereD. aurorascommunication blackouts
The correct answer is A) Different elements have different energy levels for the electrons.
The other options listed (B, C, and D) do not explain why different atoms have different lines in their spectra. Option B describes the process of absorption spectroscopy, while options C and D describe phenomena that are not related to the properties of atomic spectra.
The lines in the spectra of different atoms are caused by the energy transitions that occur when electrons move between different energy levels within the atom. Each atom has a unique set of energy levels that are determined by the arrangement of its electrons and the properties of its nucleus, including its atomic number.
When an atom absorbs or emits light, the energy of the light matches the difference in energy between two energy levels of the electrons in the atom. This produces a line in the atom's spectrum that is characteristic of that element.
Therefore, the lines in the spectra of different atoms are unique and can be used to identify the elements present in a sample of matter. This technique is called spectroscopy and is used in a wide range of fields, including astronomy, chemistry, and materials science.
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What is one situation when experiencing static electricity?
Answer:
getting shocked
Explanation:
i didnt really get the answer really much but i hope this helps
Answer:
Hair standing up
Explanation:
When there is a lot of static electricity, your hair stands up.
Gravitational attraction is the driving force for which processes? Stellar fusion Formation of Moons Expansion of the Universe Formation of stars Formation of planets Formation of nebulae
Gravitational attraction is the driving force for option (A)Stellar fusion Formation of Moons (C) Formation of stars (D) Formation of planets and (D) Formation of nebulae
Gravitational attraction is the driving force for the following processes:
Formation of moons: Gravity is responsible for the formation and maintenance of moons in orbit around planets.
Formation of stars: Gravity causes the collapse of gas and dust clouds, leading to the formation of protos tars and ultimately stars.
Formation of planets: The gravitational attraction between dust and gas particles in a protoplanetary disk causes them to clump together and form planets.
Formation of nebulae: Gravity can cause the collapse of interstellar gas and dust clouds, leading to the formation of nebulae.
Expansion of the Universe: Although not a "process" per se, gravity plays a key role in the expansion of the universe by pulling matter together, slowing the expansion.
Stellar fusion is not driven by gravitational attraction but by the intense pressure and temperature in the core of a star, where hydrogen atoms combine to form helium.
Therefore, the correct options are (A) Stellar fusion Formation of Moons (C) Formation of stars (D) Formation of planets and (D) Formation of nebulae
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A thin nonconducting rod with a uniform distribution of positive charge Q is bent into a complete circle of radius R. The perpendicular axis through the ring is a z axis, with the origin at the centre of the ring. What is the magnitude of the electric field due to the rod. In terms of R, at nitude maximum?
The magnitude of the electric field due to the bent rod at the maximum on the z-axis is given by (kQ) / (4πε0 [tex]R^2)^{ (3/2)}[/tex], where Q is R is the circle's radius, and C is the total charge on the rod.
To find the electric field at a point on the z-axis due to the charged ring, we can use the formula for the electric field due to a uniformly charged ring:
[tex]E = (kQz) / (R^2 + z^2)^{(3/2)}[/tex]
where k is Coulomb's constant, Q is the total charge on the ring, R is the radius of the ring, and z is the distance of the point on the z-axis from the centre of the ring.
Since the ring has a uniform charge distribution, we can express the total charge on the ring Q in terms of the linear charge density λ, which is defined as the charge per unit length:
Q = λ * 2πR
where 2πR is the ring's circumference.
To find the maximum electric field on the z-axis, we need to find the distance z from the centre of the ring where the denominator of the above equation is minimized. This occurs when z = R, so we can substitute z = R in the equation and simplify:
[tex]E_{MAX}[/tex] = (kλR) / (4πε0[tex]R^2)^{(3/2)}[/tex]
where 0 represents the free space permittivity.
We can simplify the expression further by substituting the expression for λ in terms of Q:
λ = Q / (2πR)
[tex]E_{MAX}[/tex] = (kQ) / (4πε0[tex]R^2)^{ (3/2)}[/tex]
Therefore, the magnitude of the electric field due to the bent rod at the maximum on the z-axis is given by (kQ) / (4πε0 [tex]R^2)^{ (3/2)}[/tex], where Q is R is the circle's radius, and C is the total charge on the rod.
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The cheetah can run 103 km/h, a falcon can
fly 148 km/h, and a sailfish can swim 92 km/h.
The three of them run a relay with each covering a distance L at maximum speed.
What is the average speed of this relay
team?
Answer in units of km/h.
Answer: 109.9 km/h
Explanation:
To find the average speed of the relay team, we need to determine the total distance covered by the three animals and the time it takes for them to complete the race. Assuming each animal runs/swims at maximum speed for distance L, we can calculate the time it takes for each animal to complete its part of the relay as:
Cheetah: Time taken = Distance / Speed = L / 103
Falcon: Time taken = Distance / Speed = L / 148
Sailfish: Time taken = Distance / Speed = L / 92
Since the three animals take turns to complete the race, the total time taken for the relay race would be the sum of the time taken by each animal:
Total time taken = L/103 + L/148 + L/92
To find the average speed, we need to divide the total distance covered (3L) by the total time taken:
Average speed = Total distance / Total time
= 3L / (L/103 + L/148 + L/92)
= 3 / (1/103 + 1/148 + 1/92)
= 109.9 km/h (rounded to one decimal place)
Therefore, the average speed of the relay team is approximately 109.9 km/h.
Regenerate response
what is 40 degrees celsius in fahrenheit
40 degrees Celsius equals 104 degrees Fahrenheit. We use the formula: F = (C x 1.8) + 32
40 degrees Celsius equals 104 degrees Fahrenheit. The Fahrenheit and Celsius scales are two common temperature measurement systems used around the world. The Celsius scale is based on the freezing and boiling points of water, where 0 degrees Celsius is the freezing point and 100 degrees Celsius is the boiling point at standard atmospheric pressure. In contrast, the Fahrenheit scale is based on a system where 32 degrees Fahrenheit is the freezing point and 212 degrees Fahrenheit is the boiling point of water at standard atmospheric pressure.
To convert Celsius to Fahrenheit, you can use the formula:
F = (C x 1.8) + 32
Therefore, 40 degrees Celsius multiplied by 1.8 and then adding 32 equals 104 degrees Fahrenheit
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A shopper in Whole Foods pushes their cart with a force of 40 N directed at an angle of
30 degrees downward form the horizontal. Find the work done by the shopper on the
cart as he moves down a 15 m aisle to the tofu section.
If the mass of the cart (24kg), from problem 1, and we neglect friction, how fast will the cart
be moving when it reaches the tofu section if it started from rest?
The shopper brings the cart to rest is 2.7 s when he reaches the tofu. What power
does he exert in stopping the cart?
You take the bus with your bike to the top of Twin Peaks in San Francisco. You are
facing a long descent: the top of Twin Peaks is 600 m higher than its base. The
combined mass of you and your bicycle is 85 kg. How much gravitational potential
energy do you have before your descent?
• On an unknown airless planet an astronaut drops a 4 kg ball from a 60 m ledge. The
mass hits the bottom with a speed of 12 m/s. What is the acceleration of gravity g on
this planet?
You descend. If all that potential energy is converted to kinetic energy, what will your
speed be at the bottom?
The planet has a twin in an alternate universe with exactly the same acceleration of
gravity. The difference is that this planet has an atmosphere. In this case, when
dropped from a ledge with the same height, the 4 kg ball hits bottom at the speed of 9
m/s. How much energy is lost to air resistance during the fall?
A 1500 kg car starts at rest and speeds up to 3 m/s with a constant acceleration. If the
car reaches its final speed in 1.2 s, what is its acceleration?
•
How far does the car travel in that time?
• What is the car's gain in kinetic energy?
• What power is exerted by the engine?
Answer:
Work done by the shopper on the cart: The force of 40 N at an angle of 30 degrees downward from the horizontal can be resolved into its horizontal and vertical components. The horizontal component of the force is:F_horizontal = F * cos(theta) = 40 N * cos(30) = 34.64 N
The work done by the shopper on the cart is equal to the force applied multiplied by the distance moved, multiplied by the cosine of the angle between the force and the displacement. In this case, the displacement is 15 m, and the angle between the force and the displacement is 30 degrees. Therefore:Work = F * d * cos(theta) = 34.64 N * 15 m * cos(30) = 448.5 J
Speed of the cart at the tofu section: The initial potential energy of the cart and shopper is equal to their combined mass (85 kg) multiplied by the acceleration due to gravity (9.81 m/s^2) multiplied by the height of Twin Peaks (600 m).
Therefore: Potential energy = m * g * h = 85 kg * 9.81 m/s^2 * 600 m = 498,690 J
Since the shopper neglects friction, all of the potential energy is converted into kinetic energy at the bottom of the hill. The kinetic energy of the cart and shopper can be found using the formula:
Kinetic energy = 0.5 * m * v^2
where m is the mass of the cart and shopper, and v is their speed.
Therefore:Kinetic energy = 0.5 * 85 kg * v^2 Since the potential and kinetic energies are equal, we can set them equal to each other and solve for the speed v: Potential energy = Kinetic energym * g * h = 0.5 * m * v^2v = sqrt(2 * g * h) = sqrt(2 * 9.81 m/s^2 * 600 m) = 109.43 m/s
Power exerted by the shopper in stopping the cart:The shopper brings the cart to rest over a distance of 15 m in a time of 2.7 s. The average force exerted by the shopper on the cart can be found using Newton's second law: F = m * a = m * (v_f - v_i) / twhere m is the mass of the cart, v_i is the initial speed of the cart (which is zero), v_f is the final speed of the cart, and t is the time taken to stop the cart. Solving for F gives:F = m * (v_f / t)The work done by the shopper in stopping the cart is equal to the force applied multiplied by the distance moved, which is 15 m. Therefore:Work = F * d = m * (v_f / t) * d = 24 kg * (0 - 0) / 2.7 s * 15 m = 0 JSince no work is done in bringing the cart to rest, the power exerted by the shopper is zero.Acceleration due to gravity on the unknown planet:The final speed of the 4 kg ball is 12 m/s, and it falls a distance of 60 m. The initial speed is zero, so the final velocity is equal to the velocity acquired due to gravity. The final velocity can be found using the formula:v_f^2 = v_i^2 + 2 * g * hwhere v_i is the initial velocity (which is zero), h is the height fallen, and g is the acceleration due to gravity.
When a car travels around a curve in the road ____ helps to keep the car traveling in a curved path?
When a car travels around a curve in the road centripetal force helps to keep the car traveling in a curved path.
What factors help a car moving in circular path?
The primary factor is the force of friction between the tires and the road. This force is what allows the car to maintain traction and grip the road surface, preventing it from sliding off the curve. As the car turns, the force of friction acting on the tires generates a centripetal force, which pulls the car towards the center of the curve.
Other factors that contribute to keeping the car on the curved path include the design of the road and the car's suspension system. Roads are often banked on curves, which means they are angled to the inside of the curve. This banking helps to create a force that pushes the car towards the center of the curve, reducing the amount of lateral force required to maintain the turn. The car's suspension system also plays a role in keeping the car stable during the turn by absorbing shocks and vibrations and helping to maintain the car's balance.
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As an objects falls freely near earths surface the loss in gravitational potential energy of the objects is equal to its
An object's loss in gravitational potential energy as it descends freely close to the surface of the earth is equal to its "kinetic energy."
Explain the conversion of gravitational potential energy in kinetic energy?Both in the scientific and common sense, climbing stairs as well as lifting objects count as work because they both involve exerting force against gravity. Energy undergoes a transition when work is done.
The effort put out to resist gravity is converted into a significant kind of stored energy, which we will examine in this section. This is what we refer to as gravitational potential energy.Kinetic energy is one possible transformation of gravitational potential energy. Gravitational force will exert work on the mass equal to mgh if we let it go, increasing its kinetic energy by the equivalent amount (as per the work-energy theorem).Thus, an object's loss in gravitational potential energy as it descends freely close to the surface of the earth is equal to its kinetic energy.
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The complete question is-
As an objects falls freely near earths surface the loss in gravitational potential energy of the objects is equal to its _______.
Two charges are aligned with a -2.5x10-6 C charge 0.50 m directly below a 3.0x10-6 C charge. Calculate the force acting on both charges, including direction.
Show work please.
what type of waves move energy forward, but the source moves up and down?
Answer:
Transverse waves
Explanation:
Answer the two questions in the photo. (10p)
Answer: both answers are D
Explanation: Mass is measured in kilograms; even though we usually talk about weight in kilograms, strictly speaking it should be measured in newtons, the units of force.
Density is the substance's mass per unit of volume.
Answer:
Both answers are d
Explanation:
Mass is measured in kilograms; although we usually talk about weight in kilograms, strictly speaking, it should be measured in newtons, the units of force.
Density is the substance's mass per unit of volume.
Brainliest Please
who were recognized for exoplanet discoveries with a share of the 2019 nobel prize in physics?
The Nobel Prize of 2019 in Physics was shared by the three scientists: James Peebles, Michel Mayor, and Didier Queloz.
James Peebles received half of the prize "for the theoretical discoveries in physical cosmology", while Michel Mayor and Didier Queloz shared other half "for the discovery of exoplanet orbiting a solar-type star."
Mayor and Queloz were recognized for their discovery of first exoplanet orbiting a sun-like star, 51 Pegasi b, which they detected using the radial velocity method. Their discovery opened up a new field of astronomy and led to the detection of thousands of other exoplanets in the years since.
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when you step outside and feel the heat of the sun on your skin What form of heat transfer is this?
Answer:Radiation
Explanation:
7. Force = 13kN Mass = 58kg Acceleration = ?
The acceleration, given that the force is 13 KN and the mass is 58 Kg is 224.14 m/s²
How do I determine the acceleration?Force and acceleration is related according to the following equation:
Force = mass × acceleration
From the question given above, the following data were obtained:
Force (F) = 13 KN = 13 × 1000 = 13000 NMass of object (m) = 58 KgAcceleration of object (a) = ?The acceleration can be obtained as illustrated below:
Force = mass × acceleration
13000 = 58 × acceleration
Divide both sides by 58
Acceleration = 13000 / 58
Acceleration = 224.14 m/s²
This, from the calculation made above, we can conclude that the acceleration is 224.14 m/s²
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The acceleration of the object is determined as 224.1 m/s².
What is acceleration?
Acceleration is the rate at which an object's velocity changes over time. It is the change in velocity divided by the time interval over which that change occurred.
The acceleration of an object can be determined by applying Newton's second law of motion as shown below;
F = ma
where;
m is the mass of the objecta is the acceleration of the objectThe acceleration of the object is calculated as;
a = F / m
a = ( 13,000 N ) / ( 58 kg )
a = 224.1 m/s²
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Question
Jayden was given a marshmallow and a syringe in class to experiment with. She placed the marshmallow in the syringe and sealed the end. When she depressed the plunger of the syringe what happened to the marshmallow and why?
Responses
A The increased pressure, allowed the molecules to spread apart, and caused the marshmallow to grow larger.The increased pressure, allowed the molecules to spread apart, and caused the marshmallow to grow larger.
B The increased pressure, pushed the molecules closer together, and caused the marshmallow to shrink.The increased pressure, pushed the molecules closer together, and caused the marshmallow to shrink.
C The decreased pressure, allowed the molecules to spread apart, and caused the marshmallow to grow larger.The decreased pressure, allowed the molecules to spread apart, and caused the marshmallow to grow larger.
D The decreased pressure, pushed the molecules closer together, and caused the marshmallow to shrink.
The marshmallow shrunk as a result of the increased pressure's effect on the molecules' tendency to cluster together (option b).
Stress equates to pressure, right?Between pressure and stress, there are several distinctions. Although both of these words are frequently used interchangeably. Generally speaking, the force applied per unit area can be used to quantify pressure. The amount of force applied per unit area that a material experiences is referred to as stress, on the other hand.
What do you mean by pressure?When we feel compelled and intimidated, we tend to react in a worried manner. It typically takes place when we are faced with a circumstance that we don't feel in control of or can manage. whenever we are under stress, such as when we are trying to balance a lot of obligations.
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a 10-cm-diameter, 20-cm-tall steel cylinder floats in mercury. the axis of the cylinder is perpendicular to the surface. what length of steel is above the surface?
Approximately 5.6 cm of the steel cylinder is above the surface of the mercury.
What is Density ?
Density is a physical property that describes the amount of mass in a given volume of a substance. It is defined as the mass of a substance per unit volume, usually expressed in grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).
The formula for density is:
Density = Mass / Volume
This means that density is directly proportional to the mass of a substance and inversely proportional to its volume. A substance with a higher mass and a smaller volume will have a higher density than a substance with a lower mass and a larger volume.
To determine the length of the steel cylinder that is above the surface of the mercury, we need to consider the buoyant force acting on the cylinder. The buoyant force is equal to the weight of the fluid displaced by the object, which in this case is the mercury.
Since the cylinder is floating, the buoyant force acting on it is equal in magnitude to its weight. We can calculate the weight of the cylinder using its density and volume. The density of steel is about 7,800 kg/m³, and the volume of the cylinder can be calculated as:
V = πr²h
where r is the radius of the cylinder (which is half the diameter) and h is its height. Substituting the given values, we get:
V = π(0.05 m)²(0.20 m) = 0.000785 m³
The weight of the cylinder is then:
W = mg = ρVg
where ρ is the density of steel, g is the acceleration due to gravity, and m is the mass of the cylinder (which we can calculate using its density and volume). Substituting the given values, we get:
m = ρV = (7,800 kg/m³)(0.000785 m³) = 6.123 kg
W = mg = (6.123 kg)(9.81 m/s²) = 60.053 N
The buoyant force acting on the cylinder is equal to its weight, so:
Fb = W = 60.053 N
We can also calculate the volume of mercury displaced by the cylinder. Since the cylinder is perpendicular to the surface of the mercury, the volume of mercury displaced is equal to the volume of the cylinder that is submerged in the mercury. The submerged volume can be calculated as:
Vsub = [tex]\pi r^2x[/tex]
where x is the length of the cylinder that is submerged in the mercury. Substituting the given values, we get:
Vsub =[tex]\pi(0.05 m)^2x[/tex]
We can now use Archimedes' principle to relate the buoyant force to the submerged volume of mercury:
Fb = ρgVsub
where ρ is the density of mercury, g is the acceleration due to gravity, and Vsub is the volume of mercury displaced. Substituting the given values, we get:
[tex]\mathrm60.053 N = (13,600 kg/m^3)(9.81 m/s^2)\pi(0.05 m)^2x[/tex]
Solving for x, we get:
x = 0.144 m
Therefore, the length of steel above the surface of the mercury is:
[tex]h - x = 0.20 m - 0.144 m = 0.056 m[/tex]
So, approximately 5.6 cm of the steel cylinder is above the surface of the mercury.
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as the body jumps into the air, what three factors other than gravity and air resistance influence the trajectory of the body as described in exsc 350?
When a body jumps into the air, in addition to the effects of gravity and air resistance, several other factors influence its trajectory. Three of the most important factors are Initial velocity, angle of projection, and Spin or angular momentum.
Initial velocity: The velocity at which the body jumps into the air has a significant effect on its trajectory. A body that jumps with a higher initial velocity will travel farther and higher than one that jumps with a lower velocity.
The angle of projection: The angle at which the body is projected into the air can greatly affect its trajectory. If the body is projected at a low angle, it will travel farther along the ground, while a higher angle of projection will result in a shorter distance but greater height.
Spin or angular momentum: The spin or angular momentum of the body can affect its trajectory by causing it to deviate from a straight line. A body with no spin will typically follow a straight trajectory, while one with spin will experience a curved or twisting motion in the air. This effect is particularly important in sports such as baseball, tennis, and gymnastics, where the spin of the ball or body can greatly influence its trajectory.
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what does the presence of molecular bands in the spectrum of a star indicate?
The presence of molecular bands in the spectrum of a star indicates the chemical composition of its atmosphere.
The spectrum of a star is a graph that shows the intensity of light emitted by the star at different wavelengths. When this light passes through the star's atmosphere, it interacts with the gases and elements present there. This interaction creates absorption lines and bands in the spectrum, which can be used to determine the chemical composition of the star's atmosphere.
Molecular bands in the spectrum indicate the presence of molecules in the star's atmosphere, such as hydrogen, helium, water vapor, carbon dioxide, and methane.
By analyzing the spectrum of a star, astronomers can determine its chemical composition and gain insights into its properties, such as its temperature, density, and age.
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An electric heater has two power settings .One Setting is 0.5kW and the other is 1.5kW One Kwh Of Electricity Cost 11 Pence . Calculate how much you would save if you used the heater 12 hours on the 0.5 setting Instead of the 1.5kW Setting.
I really need help on this
answer
is 1 kw is the answer