According to general relativity, Earth goes around the sun rather than flying straight off into space because of the curvature of spacetime caused by the mass of the sun.
The general theory of relativity explains how gravity is actually caused by the curvature of spacetime and not by any actual force at all. The mass of the sun bends spacetime, which in the case of the Earth orbiting the sun causes the Earth to move on a curved orbit. The orbit of the Earth is visible as a curving path.
The Earth would indeed continue to move in a straight line if it weren't for the sun's mass's effect on the curvature of spacetime. But, general relativity offers a more thorough understanding of gravity and demonstrates that the Earth's and other solar system objects' motions are caused by the curvature of spacetime.
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A car with mass of 1200kg, went from 20 km/hr to 7 km/hr - what is the car’s impulse?
A) 12500 kg.m/s
B) 16200 kg.m/s
C) 18700 kg.m/s
The impulsive force of the car will be 4,333. Kg.m/s.
What is impulse?In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion. It is often stated in Newton seconds or kilograms per second and is denoted by the symbol J.
given, A car with a mass of 1200kg, went from 20 km/hr to 7 km/hr.
From the general formula of impulse:
Impulsive force j = mass( initial velocity - final velocity)
In our case,
initial velocity = 20 Km/hr
Final velocity = 7 Km/hr
mass = 1200 Kg
So,
Impulsive force = 1200( 20 - 7)
impulsive force = 15600 Kg. km/hr
Since 1 km/ hr = 5/18 m/s
impulsive force = 15600 * 5 /18 Kg.m/s
impulsive force = 4,333.33 Kg.m/s
Therefore, the impulsive force of the car will be 4,333. Kg.m/s.
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Calculate the ratio of the drag force on a jet flying at 1000km/h at an altitude of 10 km to the drag force on a prop-driven transport flying at half that speed and altitude. The density of air is 0.38kg/m 3
at 10 km and 0.67kg/m 3
at 5.0km. Assume that the airplanes have the same effective cross-sectional area and drag coefficient C.
The airplanes have the same effective cross sectional area and drag coefficient. Then, the ratio of drag force at the two densities is 2.3.
What is drag force ?The drag force is an air resistance which resist the motion of objects passing through air. It is related to the density ρ, drag coefficient C, velocity v and area A as follows:
D = 1/2 ρCAv².
Here, C and A are the same then the ratio of the drag forces D1 and D2 at the two densities is:
D1/D2 = ρ1 v1²/ρ2 v2²
ρ1 = 0.38 kg/m³
ρ2 = 0.67 kg/m³
v1 = 1000 km/h
v2 = 500 km/h
Then the ratios of drag force is ;
D1/D2 = 0.38 kg/m³ × 1000 km/h / (0.67 kg/m³ × 500 km/h)
= 2.3
Therefore, the ratio of drag force at the two densities is 2.3.
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mass is conserved in a reaction if the ____ of the initial reactant masses equals the ____ of the masses of choose...
"Mass is conserved in a reaction if the sum of the initial reactant masses equals the sum of the masses of products."
According to the principle of mass conservation, neither chemical reactions nor physical changes can produce or destroy mass in an isolated system. The mass of the products and reactants in a chemical reaction must be equal, in accordance with the rule of conservation of mass.
Reactants are the substances that participate in a chemical process. The process by which atoms, the fundamental components of matter, rearrange themselves to form novel mixtures is known as a chemical reaction. When raw materials combine, they are referred to as reactants.
Initial elements are referred to as reactants on the left side of the equation. The products, which stand for the outcome of the reaction, are enumerated on the right-hand side of the equation.
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[use your star wheel] what bright star will be straight overhead at midnight on june 20?
The bright star that will be straight overhead at midnight on june 20 will be Vega.
option D.
What bright star will be straight overhead at midnight on june 20?
To determine the answer to this question using a star wheel, you will need to know your latitude and the local time of the observation. Assuming you are located in the northern hemisphere and at a latitude of about 40 degrees, and that the local time is set to midnight on June 20, the star that will be straight overhead will be Vega.
To use a star wheel, first set the date to June 20 and align the wheel with your local time (midnight in this case). Next, find the altitude (height above the horizon) of the stars located at the center of the wheel (i.e. the stars that are closest to the center point).
The star with the highest altitude will be the one closest to being straight overhead. In this case, Vega will be the brightest star closest to the center point, so it will be the one closest to being straight overhead at midnight on June 20.
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The complete question is below:
What bright star will be straight overhead at midnight on June 20? (Using your star wheel)
A) Sirius
B) Arcturus
C) Capella
D) Vega
FILL IN THE BLANK. electrical devices that produce arcs when installed in volatile environments are sealed in special enclosures to prevent _____.
Electrical devices that produce arcs when installed in volatile environments are sealed in special enclosures to prevent explosions.
Electrical devices that produce arcs, such as switches, relays, and circuit breakers, generate a high amount of heat and electromagnetic energy. When installed in volatile environments, such as areas with flammable gases or liquids, the arcs generated by these devices can ignite the surrounding environment, leading to fires or explosions. To prevent this from happening, these devices are sealed in special enclosures that prevent the release of sparks or hot gases into the environment. These enclosures are designed to contain any potential explosions or fires within the enclosure, protecting the surrounding area from any harm.
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when wax freezes is energy absorbed. (true or false)
The statement saying that when wax freezes it absorbs energy is false.
When the wax freezes utilizes energy into the surrounding because it is an exothermic process.
As the particles present in the wax settles and entropy of the system of the wax decreases they tend to lose energy and attained the state in which they will have the least potential energy.
In the process of the freezing of wax both these things take place and it results in the energy being released. So, the statement saying that energy is absorbed during the freezing of wax is false.
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A teacher demonstrates air pressure to the class. She takes a soft drinks can and puts a little bit of water in it. Then she heats it up until the water is boiling. The students watch as the steam pushes air out of the can. The teacher then quickly takes the can, turns it over and dips the open end in a bowl of water. A short time later there is a loud bang and the can collapses.
(1) When the teacher cools the can some of the steam turns back to water. What happens to the air pressure inside the can?
The air pressure was increased and then the can had to burst.
What is the relationship between the temperature and the air pressure?There is a direct relationship between temperature and air pressure, known as the "ideal gas law." According to this law, the pressure of a gas is directly proportional to its temperature when the volume and the number of particles of the gas are constant.
Specifically, the ideal gas law states that PV = nRT, where P is the pressure of the gas, V is its volume, n is the number of particles of the gas, R is the gas constant, and T is the temperature of the gas measured in Kelvin.
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What is a learned behavior exactly?
A. passed down from parents.
B. a behavior shaped by the environment
C. a behavior that develops naturally, or D. a behavior that can help an organism camouflage.... SCIENCE
Answer:
B
Explanation:
The learned behavior would have been shaped by the environment therefore C is your answer.
what is the astronomical object of celestialbodies
Celestial bodies are objects in space such as the sun, moon, planets, and stars. They form part of the vast universe we live in and are usually very distant from us.
Stars, planets, moons, and many other celestial bodies in the sky are called celestial bodies. The sun and the other celestial bodies that revolving around it form the solar system. These celestial bodies include planets, comets, asteroids, and meteors. Celestial bodies are natural objects floating in space. For example, stars, planets, meteorites, moons, and other space objects. Astronomers use special frames of reference. This is known as the celestial coordinate system. This system is similar to the system used to locate objects on the Earth's surface. Use measurements from known reference points or lines.
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at a minimum, how frequently should an ocular micrometer be calibrated?
An ocular micrometer is a measuring tool used in microscopy to measure the size of objects under a microscope. Calibration is the process of ensuring that the ocular micrometer is accurate and giving the correct measurements.
What is ocular micrometer?
An ocular micrometer, also known as an eyepiece graticule, is a measuring tool used in microscopy to measure the size of objects viewed through a microscope. It consists of a small, transparent ruler that is placed in the eyepiece of a microscope.
The ruler is etched with fine lines that are used to measure the size of microscopic objects. These lines can be either simple or complex and are usually calibrated to a specific scale, such as millimeters or micrometers. When the microscope is focused on the object, the lines on the ocular micrometer are superimposed onto the image of the object.
An ocular micrometer is a measuring tool used in microscopy to measure the size of objects under a microscope. Calibration is the process of ensuring that the ocular micrometer is accurate and giving the correct measurements.
The frequency of calibration for an ocular micrometer depends on various factors, such as the type and quality of the micrometer, the frequency of use, and the environment in which it is used. However, as a general rule, it is recommended that an ocular micrometer should be calibrated at least once a year.
If the micrometer is used frequently or subjected to harsh environments, it may need to be calibrated more frequently. Additionally, if the micrometer is dropped or damaged, it should be recalibrated before use.
It is important to follow the manufacturer's recommendations and guidelines for the specific type of ocular micrometer being used to ensure accurate measurements.
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centric forces tend to promote _________ movement; eccentric forces tend to promote __________ movement.
Centric forces tend to promote linear or straight-line movement, while eccentric forces tend to promote rotational or angular movement.
Centric and eccentric forces are terms used in the context of muscle movement and contraction. Centric forces refer to forces that act along the longitudinal axis of a bone, causing linear motion of the bone. These forces are typically produced by the contraction of muscles that cross the joint perpendicular to its axis. An example of a centric force would be the contraction of the biceps muscle to lift a weight. Eccentric forces, on the other hand, refer to forces that act on a bone in a direction perpendicular to its longitudinal axis, causing rotational or angular motion of the bone.
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The Sun has a temperature of 5780 K. What is the wavelength and frequency where its spectrum peaks? Which color does this correspond to? How does the energy flux of the Sun compare that of a red dwarf whose temperature is a mere 2,000 K, and is of the same size?
1) The wavelength at which the Sun's spectrum peaks is approximately 5.02 x 10^-7 m, and the frequency at which it peaks is approximately 5.99 x 10^14 H
2) The color corresponding to this wavelength is yellow-green
3) The energy flux of the Sun is much higher than that of a red dwarf of the same size, by a factor of approximately 1.9 x 10^4.
To determine the wavelength and frequency at which the Sun's spectrum peaks, we can use Wien's displacement law which states that the peak wavelength of blackbody radiation is inversely proportional to the temperature of the object. Mathematically,
λ_max = b/T
where λ_max is the peak wavelength, T is the temperature of the object, and b is Wien's displacement constant, which is equal to approximately 2.898 x 10^-3 m*K.
Substituting T = 5780 K and b = 2.898 x 10^-3 m*K, we get:
λ_max = (2.898 x 10^-3 m*K) / (5780 K) = 5.02 x 10^-7 m
Therefore, the wavelength at which the Sun's spectrum peaks is approximately 5.02 x 10^-7 m.
We can also use the relationship between wavelength and frequency of electromagnetic radiation:
c = λf
where c is the speed of light (3 x 10^8 m/s), λ is the wavelength, and f is the frequency.
Rearranging the equation to solve for f, we get:
f = c/λ = (3 x 10^8 m/s) / (5.02 x 10^-7 m) = 5.99 x 10^14 Hz
2) The color corresponding to this wavelength is yellow-green, which is in the middle of the visible spectrum.
3) The energy flux of a star is proportional to its surface temperature to the fourth power (Stefan-Boltzmann law), so the energy flux of the Sun can be calculated as:
E_Sun = σT^4A
where σ is the Stefan-Boltzmann constant (5.67 x 10^-8 W/m^2 K^4), T is the temperature of the Sun (5780 K), and A is the surface area of the Sun. Assuming the Sun has a radius of approximately 696,340 km, we get:
A_Sun = 4π(696,340 km)^2 = 6.09 x 10^18 m^2
Substituting these values, we get:
E_Sun = (5.67 x 10^-8 W/m^2 K^4) x (5780 K)^4 x (6.09 x 10^18 m^2) = 3.85 x 10^26 W
Now, let's compare this to the energy flux of a red dwarf with a temperature of 2000 K. Using the same equation, we get:
E_red dwarf = (5.67 x 10^-8 W/m^2 K^4) x (2000 K)^4 x (6.09 x 10^18 m^2) = 2.03 x 10^22 W
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Gravitational attraction is the driving force for which processes? a) Stellar fusion. b) Formation of Moons. c) Expansion of the Universe. d) Formation of stars. e) Formation of planets. f) Formation of nebulae.
Gravitational attraction is the driving force for the following processes:
b) Formation of moons - The gravitational force between a planet and its moon(s) is what keeps the moon(s) in orbit around the planet.
d) Formation of stars - The gravitational force between gas and dust particles in a molecular cloud can cause them to collapse and form a protostar, which can then develop into a star.
e) Formation of planets - After a protostar form, the leftover gas and dust in the protoplanetary disk can be drawn together by gravitational attraction to form planets.
f) Formation of nebulae - Gravity can cause a region of interstellar gas and dust to collapse and form a dense cloud, which can then develop into a nebula.
Gravity is a fundamental force of nature that causes all objects with mass or energy to attract one another. It is described by Isaac Newton's law of universal gravitation, which states that the gravitational force between two objects is directly proportional to their masses and inversely proportional to the distance between them squared.
Gravity is a ubiquitous force that affects all aspects of the universe, from the motion of planets and stars to the behavior of subatomic particles. It is the force that keeps us grounded on Earth and determines the structure and evolution of the cosmos.
In the 20th century, Einstein's theory of general relativity provided a new understanding of gravity as a curvature of space-time caused by the presence of mass and energy. This theory has been confirmed by numerous experiments and observations, and it is now the accepted framework for understanding gravity at the largest scales.
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how does the material type affect the descent of the parachute?
On average, the parachute with the lightest material will fall more slowly, whereas the parachute with the heaviest material will fall more quickly.
The material determines how the parachute descends, hence it is crucial that it is lightweight, flexible, and windproof. It must be able to withstand winds at high altitudes and other environmental factors. More time is required to descend with lighter materials, while less time is required to descend with heavier materials. This is the main reason why the material is essentially chosen to be lighter or less heavy.
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what is lbs a force?
Pounds (lbs) is not a force but a unit of weight.
The pound (lb) is a unit of weight commonly used in the United States and other countries. Weight is a measure of the force exerted on an object due to gravity, and the pound is defined as the force exerted by gravity on an object with a mass of one pound at sea level on Earth.
This means that the pound is a unit of force, but specifically, it is a force that is equal to the weight of one pound of mass. Therefore, when we use the unit "pounds" (lbs), we are referring to weight, not force, and we are measuring the gravitational force exerted on an object due to its mass.
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--The complete question is, what is lbs, a force or unit of weight?--
Set up the experiment as follows:
Make a small hole in the cardboard. It should be ½ inch from one edge and centered.
Pull the string or thread through the hole in the cardboard, and tie the ends together to form a loop.
Slide a large paperclip onto the string, and bend one end out slightly to act as a hook.
Place a nonbreakable object, such as a kitchen utensil, on the cardboard.
Select two nonbreakable objects with holes that can be hung on the hook.
What two objects will you select to hang on the hook?
The two objects will you select to hang on the hook are a key ring, a small metal ring, and a plastic toy with a hole,
To set up this experiment, you will need to select two nonbreakable objects with holes that can be hung on the hook. Some possible options include a key ring, a small metal ring, a plastic toy with a hole, or a small plastic container with a hole.
Here is an example of how you could set up the experiment:
1. Make a small hole in the cardboard, ½ inch from one edge and centered.
2. Pull the string or thread through the hole in the cardboard, and tie the ends together to form a loop.
3. Slide a large paperclip onto the string, and bend one end out slightly to act as a hook.
4. Place a nonbreakable object, such as a kitchen utensil, on the cardboard.
5. Select two nonbreakable objects with holes that can be hung on the hook. In this example, we will use a key ring and a small metal ring.
6. Hang the key ring on the hook, and observe how the cardboard and string behave.
7. Remove the key ring, and hang the small metal ring on the hook. Observe how the cardboard and string behave.
By comparing the behavior of the cardboard and string with the different objects, you can learn about the effects of weight and balance on the system. Remember to be careful when selecting objects to hang on the hook, as you want to avoid anything that could break or cause injury.
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the two 20-ampere small-appliance branch circuits required for the kitchen and dining room area are intended to supply ___ appliances.
The wall, floor, and countertop outlets, as well as the outlet for refrigeration equipment, must be served by the two or more 20A, 120V small-appliance branch circuits that serve the kitchen, dining room, and other comparable rooms.
How many 20 amp branch circuits at a minimum are needed in a kitchen?For the supply of receptacle outlets in the kitchen, pantry, dining room, and breakfast area, a minimum of three 20-amp small appliance branch circuits must be constructed.
What number of 20 A dedicated circuits is the NEC's minimum requirement for a kitchen?The kitchen and other rooms connected to it, such as pantries, breakfast rooms, and dining rooms, must have two or more 20-ampere small-appliance branch circuits for every outlet.
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what causes already spinning nebula clumps to flatten into discs?
"Accretion disc formation" is the process by which a spinning nebula clump transforms into a flat, revolving disc as a result of several physical forces.
The conservation of angular momentum is a crucial element. Due to the conservation of angular momentum, the nebula clump begins to spin more quickly as it falls apart under the influence of gravity. The clump's overall rotation gets more structured as the material within it rotates more quickly as it approaches the centre of mass.
The impact of magnetic fields is another significant aspect. The magnetic fields within the clump strengthen and organise as it breaks apart. By helping to transfer angular momentum away from the falling material, these magnetic fields can aid the material continue to collapse.
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how to find formula mass and molar mass
Formula mass is found by summing the atomic masses of all the atoms in a chemical formula, while molar mass is the mass of one mole of a substance expressed in grams per mole.
Formula mass and molar mass are both measures of the mass of a substance. The formula mass is the sum of the atomic masses of all the atoms in a chemical formula, including any coefficients used to balance the formula. On the other hand, the molar mass is the mass of one mole of a substance and is equal to the formula mass expressed in grams per mole (g/mol).
To find the formula mass or molar mass, you need to look up the atomic masses of the elements in the chemical formula on the periodic table, multiply them by the number of atoms of each element in the formula, and then sum the results. The resulting number is the formula mass or molar mass.
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if 63 % of the thermal energy produced when it hits the ground is absorbed by the sphere, what is its temperature increase? express your answer using two significant figures.
The requried thermal energy produced when it hits the ground is absorbed by the sphere given by the expression Q = 0.63 * E.
What is thermal energy?Thermal energy is the energy that comes from the internal temperature of an object or substance. It is a form of kinetic energy that is related to the motion and vibration of molecules and atoms within a material.
Here,
To solve this problem, we need to know the specific heat capacity of the sphere and its mass. Without this information, we cannot calculate the temperature increase.
Assuming that we have the specific heat capacity and mass of the sphere, we can use the formula:
ΔT = Q / (m * c)
where ΔT is the temperature increase, Q is the thermal energy absorbed by the sphere, m is the mass of the sphere, and c is the specific heat capacity of the sphere.
Since 63% of the thermal energy produced when it hits the ground is absorbed by the sphere, we can write:
Q = 0.63 * E
where E is the thermal energy produced when it hits the ground.
Thus, the requried thermal energy produced when it hits the ground is absorbed by the sphere is given by the expression Q = 0.63 * E.
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for an earth satellite in circular orbit, list all the values that do not change.
"For an earth satellite in circular orbit, the values that do not change are speed, gravitational force and distance from the Earth."
Although its velocity changes, its speed does not. Acceleration suggests a change in velocity but does not always imply a change in speed. An trajectory that is perfectly balanced and has a constant speed is called a circular orbit. Every turn in the circular path sees a change in orientation.
A satellite in a circular orbit is not affected by gravity's force because the force is needed to alter the satellite's direction of travel, not its speed. A satellite moves in a circular pattern with a consistent speed known as uniform circular motion.
The distance from the earth to the satellite is also constant as the satellite only moves in the fixed orbit.
Thus, for an earth satellite in circular orbit, the values that do not change are speed, gravitational force and distance from the Earth.
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how to convert kj to calories
To convert kilojoules (kJ) to calories (cal), you can use the following conversion factor: 1 calorie = 4.184 kilojoules
Joules (J) is the SI unit of energy. One joule is equal to the amount of energy required to perform one unit of work by applying a force of one newton through a distance of one meter in the direction of the force.
In other words, if a force of one newton is applied to an object and it moves one meter in the direction of the force, the work done is one joule.
Joules can be used to measure various forms of energy, including kinetic energy (the energy of motion), potential energy (the energy of position), and thermal energy (the energy of heat). Therefore, to convert kJ to calories, you can multiply the number of kJ by 4.184.
For example, if you have 200 kJ and want to convert it to calories, you would do:
200 kJ * 4.184 cal/kJ = 836.8 cal
So, 200 kJ is equal to 836.8 calories.
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Read each scenario below. then select the answer choices that complete the sentences. a car engine has power than a horse because a car engine does the same amount of work in time. yasmin and raj each had 10 boxes of equal weight to stack next to each other on the same shelf, at the same height and in the same arrangement. yasmin completed the task in 2 minutes, while raj took 3 minutes to stack his boxes. raj applied power than yasmin because his stacking took time to do the same amount of work.
In both scenarios, the concept of power and work is demonstrated. A car engine has more power than a horse because a car engine can do the same amount of work in less time. Raj applied less power than Yasmin because his stacking took more time to do the same amount of work.
Power is defined as the rate at which work is done, which means that the more power applied, the faster work can be done.
In the first scenario, a car engine has more power than a horse because it can do the same amount of work in less time. This is because the car engine can convert energy from fuel more efficiently than a horse can convert energy from food. As a result, the car engine can produce more power and do more work in a shorter amount of time.
In the second scenario, Yasmin completed the task of stacking 10 boxes in 2 minutes, while Raj took 3 minutes to complete the same task. This means that Yasmin applied more power than Raj because she was able to do the same amount of work in less time. This could be due to a variety of factors, such as Yasmin having more experience or strength, or using a more efficient technique.
These scenarios demonstrate that power and work are closely related.
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___The given question is incomplete, the complete question is given below:
A car engine has___ power than a horse because a car engine does the same amount of work in___ time. Yasmin and Raj each had 10 boxes of equal weight to stack next to each other on the same shelf, at the same height and in the same arrangement. Yasmin completed the task in 2 minutes, while Raj took 3 minutes to stack his boxes. Raj applied___ power than Yasmin because his stacking took____ time to do the same amount of work.
Answer:
More for the first question
Less for the second question
Less for the third question
More for the fourth question
Explanation:
I Did This in Edge
Match each model with the behavior of light waves that it illustrates
A. a sponge taking on water B. a car changing direction on a different surface C.ocean waves changing direction as they go through the poles on a dock D. a sponge taking on water bouncing a ball on a table
( options r diffraction, absorption, refraction, and reflection )
A. Absorption
B. Refraction
C. Diffraction
D. Reflection
Modeling light wavesWhen a sponge takes on water, it absorbs the water into its structure. Similarly, when light waves are absorbed by a material, they are taken up by the material, and their energy is transferred to the material.When a car changes direction on a different surface, it changes speed and direction due to the effect of the surface on its movement. Refraction is the bending of light waves when they pass through a medium with a different refractive index, causing a change in direction and speed.When ocean waves pass through the poles on a dock, they spread out and bend around the corners of the poles, changing direction. This behavior of waves is known as diffraction, which occurs when waves encounter an obstacle or aperture and bend around it.When a sponge takes on water, it swells and changes shape. When a ball bounces on a table, it reflects off the surface and changes direction. Similarly, when light waves reflect off a surface, they bounce back and change direction, a behavior known as reflection.More on light waves can be found here: https://brainly.com/question/25588186
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As a huge rotating cloud of particles in space gravitate together forming an increasingly dense ball, it shrinks in size.a. Trueb. False
The statement is true. As a huge rotating cloud of particles in space gravitate together forming an increasingly dense ball, it shrinks in size.
True.
As a cloud of particles in space gravitate together, the gravitational potential energy of the system is converted into kinetic energy, causing the cloud to heat up and the particles to move faster. This heat and motion counteract the force of gravity, which tends to pull the particles together. As the cloud continues to shrink in size, it becomes denser and hotter until it eventually becomes a protostar. The shrinking of the cloud is due to the force of gravity overpowering the kinetic energy of the particles, causing them to collapse towards the center of mass. This process is known as gravitational collapse.
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when is your potential energy and kinetic energy at the max at a swing
Potential energy is held in a swing when it is pulled to one side, and when it is released, it transforms into kinetic energy. The topmost position of it has the highest potential energy, whereas the bottommost position, where the kinetic energy is highest, has the lowest potential energy.
When does kinetic energy peak during a swing?The swing's bottom, where gravity's potential energy is at its lowest, has the most kinetic energy. The pendulum keeps swinging upward while slowing down and losing kinetic energy as well as potential energy from gravity.
Where does the potential energy peak during the swing?Some of the swing's potential energy transforms into kinetic energy as it descends. The swing's kinetic energy is at its highest since it is going at its fastest speed while it is at its lowest point.
Why is the extreme position where potential energy is greatest?When bob has the greatest displacement relative to its mean position in a basic pendulum, that is an extreme position. The potential energy of the bob is at its highest point and the kinetic energy is at its lowest point in this position. Acceleration and velocity are both zero when in an extreme posture.
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Wavelength, frequency, and energy are related. What happens to a wave as its
wavelength gets shorter?
A. Its frequency and energy increase
B. Its frequency and energy decrease
C. Its frequency increases, while its energy decreases
D. Its frequency decreases, while its energy increases.
Answer:
D
Explanation:
As the wavelength of a wave gets shorter, its frequency increases, while its energy increases. This relationship is described by the equation E = hf, where E is the energy, h is Planck's constant and f is the frequency of the wave.
because relative humidity is dependent on air temperature, it is ____________ in the cooler mornings and ____________ in the warmer afternoons.
Because relative humidity is dependent on air temperature, it is generally higher in the cooler mornings and lower in the warmer afternoons.
This is because warm air can hold more water vapor than cool air, so as the temperature rises in the afternoon, the air has the capacity to hold more moisture. This means that the same amount of water vapor in the air will result in a lower relative humidity when the temperature is higher. Conversely, in the cooler mornings, the air has less capacity to hold moisture, so the same amount of water vapor in the air will result in a higher relative humidity.
It's important to note, however, that this pattern is not always true and can be affected by other factors such as wind, precipitation, and geography. Additionally, relative humidity is not the same as absolute humidity, which refers to the actual amount of water vapor in the air, regardless of temperature.
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force f1 has a magnitude of 30.0 N, force f2 has a magnitude of 40 N. the angle between the forces is 60 degree. what is the magnitude and the direction of the resultant vector force, f, obtained by the vector addition of these two forces?
a. F=60.8N, θ=34.7 degrees
b. F=65.5N, θ=33.3 degrees
c. F=70.0N, θ=30.0 degrees
d. F=67.7N, θ=17.1 degrees
The answer is (a) F=60.8N, θ=34.7 degrees.
What are the laws of vector addition?The laws of vector addition include:
Commutative law: a + b = b + a.
Associative law: (a + b) + c = a + (b + c).
Distributive law: a(b + c) = ab + ac.
Additive identity: a + 0 = a.
Additive inverse: a + (-a) = 0.
To solve this problem, we can use the laws of vector addition. We can start by breaking down each force into its x and y components:
f1x = 30.0 N cos(0) = 30.0 N
f1y = 30.0 N sin(0) = 0 N
f2x = 40.0 N cos(60) = 20.0 N
f2y = 40.0 N sin(60) = 34.6 N
The x-component of the resultant force is the sum of the x-components of the two forces:
Fx = f1x + f2x = 30.0 N + 20.0 N = 50.0 N
The y-component of the resultant force is the sum of the y-components of the two forces:
Fy = f1y + f2y = 0 N + 34.6 N = 34.6 N
The magnitude of the resultant force can be stated by the Pythagorean theorem:
F = sqrt(Fx^2 + Fy^2) = sqrt((50.0 N)^2 + (34.6 N)^2) = 60.8 N
The direction of the resultant force is given by;
theta = atan(Fy/Fx) = atan(34.6 N/50.0 N) = 34.7 degrees
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what is the atomic number of calcium
The atomic number of calcium is 20, as it has 20 protons in its atom.
The atomic number is defined as the number of protons present in the nucleus of an atom, or the number of electrons present in an atom while it is in its electrically stable or neutral form. Once it loses any of its electrons or gains them, the number of electrons varies in the atom. Therefore, protons are a reliable measure to determine the atomic number of an atom. Atomic number of carbon is, therefore, 20.
An atom is composed of three primary microscopic particles- electrons, protons, and neutrons. As per the Bohr's model of an atom, protons and neutrons are present in the nucleus or the atom, while electron revolve around the nucleus in their circular paths called orbits. The mass of the nucleus, i.e., neutrons and protons, determine the atomic mass.
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