It's important to remember that not all individuals will experience the same physical changes at the same rate, and some may experience different changes due to genetics, lifestyle, and other factors.
Yes, there are differences in the physical appearance of an individual in each stage of their development. Here are some of the physical differences that typically occur at different stages:
Infancy: Infants are typically small in size and have a rounded head with soft spots (fontanels) that allow for skull growth. They have little to no hair and their skin is soft and delicate. They also have a weak neck that needs support.Childhood: Children grow rapidly during childhood, and their physical appearance changes considerably. They develop more muscle mass, their bones grow longer, and their facial features become more defined. Children also develop more hair and their skin becomes less delicate.Adolescence: Adolescence is marked by significant physical changes, including the development of secondary sexual characteristics such as breasts and pubic hair in girls, and facial hair and deepening of the voice in boys. Adolescents also grow taller and their bodies become more muscular.Adulthood: In adulthood, physical changes continue to occur but at a slower rate. Skin starts to lose elasticity, wrinkles and age spots may appear. Hair may start to thin or turn gray. The body also begins to lose muscle mass and bone density.Old age: As individuals age, they may experience a variety of physical changes such as reduced mobility, decreased flexibility, and a loss of hearing and vision. Skin continues to lose elasticity, and wrinkles and age spots become more pronounced. Hair may become thin or fall out entirely, and bones may become more brittle, leading to an increased risk of fractures.It's important to remember that not all individuals will experience the same physical changes at the same rate, and some may experience different changes due to genetics, lifestyle, and other factors.
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A soccer ball has mass when full of air of 0.45 kg. If a goalkeeper kicks this ball,
the ball will leave their foot with a velocity of 33 m/s. This kick usually occurs
when the goalkeeper's foot is 0.8 m above the ground. If another player "traps"
the ball using their chest, which is an average of 1.4 m above the ground, how fast
is that soccer ball moving right before it hits the chest of the player? [Ignore
Friction]
The soccer ball is moving at a speed of approximately 10.84 m/s just before it hits the player's chest.
What is the conservation of energy?The conservation of energy means that there is not any loss of energy but energy changes from one form to another.
To solve this problem, we can use the principle of conservation of energy, which states that the total energy in a system is conserved. In this case, we can assume that the system consists of only the soccer ball.
The initial energy of the soccer ball is given by its kinetic energy:
KE₁= 0.5 x m x v₁²
Where m is the mass of the soccer ball and v₁ is its velocity just after being kicked by the goalkeeper.
The final energy of the soccer ball just before it hits the player's chest is given by its potential energy and kinetic energy:
KE₂ + PE₂= m x g x h₂ + 0.5 x m x v₂²
Where h₂ is the height of the player's chest above the ground, g is the acceleration due to gravity (9.81 m/s²), and v₂is the velocity of the soccer ball just before it hits the player's chest.
Since energy is conserved, we can equate the initial energy to the final energy:
KE₁ = KE₂ + PE₂
Substituting the expressions for KE₁and KE₂+ PE₂, we get:
(0.5 x m x v₁²) = (m x g x h₂) + (0.5 x m x v₂²)
Simplifying and solving for v2, we get:
v₂ = √(v₁² - 2 x g x (h₂ - 0.8))
Substituting the given values, we get:
v₂ = √((33 m/s)² - (2 x 9.81 m/s²) x (1.4 m - 0.8 m))
v₂= 10.84 m/s
Therefore, the speed of the soccer ball will be 10.84 m/s just before it hits the player's chest.
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if we are using a reference voltage of 5v and analogread() returns a value of 708, what is the corresponding voltage? round your answer to the nearest tenth of a volt.
If we are using a reference voltage of 5 volts and analogread() gives a value of 708, then 3.5 is the appropriate voltage.
A voltage simple definition is what?When charged electrons (current) are forced through a conducting loop by the pressure of an electrical circuit's power source, they may perform tasks like lighting a lamp. In a nutshell, voltage equals pressure and is expressed in volts (V).
What does voltage mean?Volt. The derived unit for electric potential, voltage, and electromotive force is the volt (symbol: V). The Italian physicist Alessandro Volta (1745–1827), who created the voltaic pile, arguably the first chemical battery, is honored by having his name attached to the volt.
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Based on what you know about light and matter interactions, select all of the correct statements from the following list. a Absorption spectra have bright lines. Low-density hot gases produce emission spectra. Emission spectra have dark lines. 2 The size of an electron's orbit depends on its energy Atoms absorb energy by emisting photons. a Electrons will move to higher orbits when an atom absorbs enough energy a Hot solids emit continuous spectra.
The correct statements from the list are:
Low-density hot gases produce emission spectra.
Emission spectra have dark lines.
The size of an electron's orbit depends on its energy.
Electrons will move to higher orbits when an atom absorbs enough energy.
Hot solids emit continuous spectra.
What is an Absorption spectrum?An absorption spectrum is a pattern of dark lines or gaps in a continuous spectrum that is produced when light passes through a cooler gas or a cloud of gas. This pattern is caused by the gas absorbing certain wavelengths of light from the continuous spectrum.
Each element or molecule has a unique absorption spectrum, as they absorb different wavelengths of light based on the energy levels of their electrons. The absorption spectrum can be used to identify the presence of certain elements or molecules in a sample, as well as to study the physical and chemical properties of the gas.
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why do we only see one side of the moon from earth?
Answer:
coz it rotates at the same speed that it rotates around the Earth. The moon completes one full rotation on its axis in the time it takes to orbit the Earth. That means the same side is always turned toward us.
Explanation:
if a 3/8-inch liquid line has a vertical lift of 40 feet, how much pressure drop is there?
A) 10 psig
B) 20 psig
C) 30 psig
D) 40 psig
The pressure drop in a 3/8-inch liquid line with a 40-foot vertical lift is 20 psig.
option B
When extracting oil from low pressure systems, 130 degrees Fahrenheit should be utilised since a greater temperature will result in less refrigerant being present in the oil.
Rupture discs are employed when a pressure relief device has to open completely and instantly. These devices are also employed when a relief device's leakage must be "zero."
The rupture disc in question has a burst pressure of 30 PSI at a temperature of 130 °C.
Temperature has a big impact on how well a rupture disc performs since the thin metal rupture element's physical strength fluctuates with temperature. The pressure of the vapour created by the evaporation of a fluid (or solid) over a sample of the fluid (or solid) in such a closed container is known as the vapour pressure of a liquid, also known as the equilibrium pressure of a vapour over its liquid (or solid).
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the center of mass of a human body is located at a point that? a) lies always at the geometrical centre. b) lies always inside the body. c) lies always outside the body. d) may lie within or outside the body.
The center of mass of a human body may lie within or outside the body. Therefore, the correct option is (d) may lie within or outside the body.
The center of mass of a human body is located at a point that may lie within or outside the body.
The center of mass is the point where the mass of a system is concentrated, and it depends on the distribution of mass within the system. In a human body, the distribution of mass varies depending on factors such as body composition, posture, and movement.
For example, the center of mass of a person standing upright with their arms at their sides will be located within the body, whereas the center of mass of a person performing a backflip will temporarily move outside the body during the maneuver.
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A loaded railroad car of mass 6000 kg is rolling to the right at 2. 0 m/s when it collides and couples with an empty freight car of mass 3000 kg, rolling to the left on the same track at 3. 0 m/s. What is the velocity of the pair after the collision? (let right be positive, left be negative)
The final velocity of the coupled freight cars after the collision is -1.0 m/s, which means that they are moving to the left with a speed of 1.0 m/s.
To solve this problem, we can use the principle of conservation of momentum, which states that the total momentum of a system of objects is conserved if there are no external forces acting on the system. In this case, the two freight cars are the system, and the collision is assumed to be perfectly elastic, which means that the total kinetic energy of the system is conserved as well.
Let the positive direction be to the right, and the negative direction be to the left. Then, the initial momentum of the system is:
p_initial = m1v1 + m2v2
= 6000 kg * 2.0 m/s + (-3000 kg) * 3.0 m/s
= 6000 kgm/s - 9000 kgm/s
= -3000 kg*m/s
where m1 and v1 are the mass and velocity of the loaded car, and m2 and v2 are the mass and velocity of the empty car. The negative sign indicates that the momentum of the empty car is in the opposite direction to that of the loaded car.
After the collision, the two freight cars will move together as a single unit with a common velocity v_final. Since the total momentum of the system is conserved, we can write:
p_final = (m1 + m2) * v_final
where m1 + m2 is the total mass of the system. Setting the initial and final momenta equal and solving for v_final, we get:
v_final = p_initial / (m1 + m2)
= (-3000 kg*m/s) / (6000 kg + 3000 kg)
= -1.0 m/s
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what are three assumptions of science as a way of knowing about the world?
The foundation of science is the idea that natural events are explained by natural causes, that these reasons can be inferred from evidence in the natural world, and that these causes are consistent.
What is a science in physics?Physics is the study of how the universe's building blocks interact with the elements that make up matter. Quantum mechanics is used to study exceedingly small things, whereas general relativity is used to study the whole cosmos.
What type of science is physics?The study of matter, including its fundamental components, mobility, and behaviour in both space and time, as well as the related ideas of energy and force, is the primary goal of the area of natural science known as physics. Physics is one of science's most fundamental disciplines, and one of its main goals is to understand how the universe functions.
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which would probably be the most effective way to reduce the amount of methane released into the atmosphere?
Reducing the number of cows we raise for meat would probably be the most effective way to reduce the amount of methane released into the atmosphere
How to reduce methane in the atmosphereIf farmers generated more food from plants and less from livestock, or if they moved to more productive cattle herds, methane emissions from agriculture would probably be reduced. Moreover, emissions from landfills might be recorded.
According to estimates, the agricultural sector is responsible for 40% of all human-caused methane emissions. Avoiding the burning of fields after harvest, modifying livestock feed to reduce methane emissions, and routinely draining rice paddies are all examples of reduction techniques. a fossil fuel.
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A king’s crown, presumed to be pure gold, has a mass of 1.00 kg. When submerged in water its apparent mass is measured to be 0.92 kg. Is the crown made of pure gold (p = 19.3 kg/liter)?
The crown is not made up of pure gold as its density which is calculated is observed to be less than that of the pure gold.
The formula for an object's density is ρ = m/v.
where,
m is mass
v is volume
Mass of the crown is given as 1 kg.
When submerged in water, its mass becomes 0.92 kg.
So, volume of water displaced is 0.08 L.
Density of pure gold is given as, ρ gold = 19.3 kg/L
The amount of water that is displaced has the same volume as the crown. Let us calculate the density of crown,
ρ crown = m/v = 1/0.08 = 12.5 kg/L
Comparing the above obtained value with the density of pure gold we have, ρ crown < ρ gold.
Thus, the crown is not made up of pure gold.
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what is definition of viscosity ?
Viscosity is the drag force applied by the layer of liquid on a body.
When a liquid settles down it usually forms a layer by layer structure in it.
When another body of any shape goes between these layer a drag force is applied on the body in the direction opposite to the motion of the body. This drag force is what we call the viscosity of the liquid.
The viscosity depends on the compressive and adhesive forces present in the particle of the liquid. It also depends on the density of the liquid.
If the body has higher density than it is expected to have a higher viscosity in it.
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Instantaneous velocity can be positive, negative, or zero.
True
False
Answer:
True
Explanation:
Instantaneous velocity can be positive when a body is moving forward, it can be zero when the body is at rest and it can be negative when the body is moving in a negative direction making the acceleration negative.
Hope this helps.
halley’s come orbits the sun every 76.0 years and has an orbital eccentricity of 0.97. what are the maximum and minimum distances between the comet and the sun?
0.5 Astronomical Units are the maximum and minimum distances between the comet and the sun.
We are asked to determine the perihelion distance of Halley's comet. To do that we will use the following formula:
P = a( 1- e )
where,
P = perihelion distance
a = distance of the semi-major axis
e = eccentricity
To determine the distance of the semi-major axis we will use Kepler's third law
[tex]T^{3}[/tex] = [tex]a^{3}[/tex]
Now, we substitute the value of "T":
[tex]\sqrt[3]{(67years)}^2[/tex]= a
Solving the operations:
16.5AU = a
Now we substitute this value in the formula for the perihelion:
P = (16.5AU)(1 - 0.97)
Solving the operations:
P = 0.5AU
Therefore, the perihelion distance is 0.5 Astronomical Units.
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what produces keratin that starts the death of skin cells
Answer:
Keratinocytes are the predominant cell type of epidermis and originate in the basal layer, produce keratin, and are responsible for the formation of the epidermal water barrier by making and secreting lipids.
Answer:
Keratinocytes, which are cells in the epidermis, produce keratin, which helps create a protective barrier on the skin's outer layer [1]. As the keratinocytes produce keratin, they start to die, leading to the death of the skin cells.
A block is dropped from a high tower and is falling freely under the influence of gravity. Which one of the following statements is true concerning this situation? Neglect air resistance.
(a) As the block falls, the net work done by all of the forces acting on the block is zero joules.
(b) The kinetic energy increases by equal amounts over equal distances.
(c) The kinetic energy of the block increases by equal amounts in equal times.
(d) The potential energy of the block decreases by equal amounts in equal times.
The potential energy of the block decreases by equal amounts in equal times. Option D is the answer.
The potential energy of the blockWhen the block is dropped from a high tower and is falling freely under the influence of gravity, the only force acting on it is the force of gravity. This force does work on the block as it falls, converting the potential energy of the block due to its position to kinetic energy as it gains speed.
The potential energy of the block is given by its position above the ground and is equal to mgh,
where m is the mass of the block,
g is the acceleration due to gravity,
and h is the height of the block above the ground.
As the block falls, its height decreases, and hence its potential energy also decreases. This potential energy is converted to kinetic energy, given by (1/2)mv^2, where v is the speed of the block.
Since the force of gravity is constant, the block experiences a constant acceleration, and its speed increases at a constant rate. This means that the kinetic energy of the block increases by equal amounts in equal times (c) and the potential energy of the block decreases by equal amounts in equal times (d).
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find acceleration with mass and distance
Acceleration with mass and distance formula is Acceleration = net force/mass.
Acceleration is a change in the motion of an object, such as Mccoy speeding up on his skateboard. When an object is acted on by an unbalanced force, it accelerates. The greater the net force, the greater its acceleration, but mass also influences acceleration.
The greater the acceleration for the given magnitude of force, the smaller the mass. These relationships are summarised by Newton's second law of motion. This law states that an object's acceleration equals the net pressure placed on it divided by its mass.
It is frequently easier to measure an object's mass and acceleration than for the net force exerted on it. A balance can be used to measure mass, but instead, average acceleration can also be calculated using velocity and time.
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how much would a 55 kg person weigh on phobos? express your answer in newtons.
The weight on Phobos will be 0.3135 N
How much would a 55 kg person weigh on phobos?We know that weight is defined as:
W = mass*gravitational acceleration.
Here we know that the mass of the person is 55 kilograms, and we also know that the gravitational acceleration on phobos is:
g = 0.0057 m/s²
Then the weight will be
W = 55kg*0.0057 m/s² = 0.3135 N
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what does a blueshifted spectrum indicate?
The blueshift spectrum reveals how far away an object is from the Earth.
Any decrease in wavelength (increase in energy) with a commensurate rise in frequency of an electromagnetic wave is referred to as a blueshift. This causes a hue to shift towards the blue end of the spectrum in visible light.
As an object moves away from us, the light it emits is known as redshift; when an object moves towards us, the light it emits is known as blueshift. Astronomers use redshift and blueshift to determine how far an object is from Earth; the notion is critical in documenting the expansion of the cosmos.
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four parallel-plate capacitors are constructed using square plates, and each has a dielectric inserted between the plates.
Each capacitor's capacitance will decrease in the following order:
C> B> A> D.
An object that stores electrical energy is a capacitor. By building up electric charges on two nearby surfaces that are isolated from one another, a capacitor is a device that stores electrical energy in an electric field.
A passive electrical component having two terminals is a capacitor. Capacitance refers to a capacitor's effect. Faraday is the SI unit for capacitance (F).
C = ε₀ K A/ d
where the capacitor's area is A, the electric permittivity is 0, and the distance between the plates is d
The capacitance is inversely proportional to the distance and directly proportional to the cross-sectional area of the plates.
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Note: the full question is
Four parallel plate capacitors are constructed using square plates, and each has a dielectric inserted between the plates.
Sort the capacitance of each capacitor from highest to lowest.
Capacitor A: long side
l, distance between plates D, dielectric constant
Capacitor B: side length l
2, the distance between the plates D 2, the dielectric constant 4k.
Capacitor C: side length 2l, distance between plates D, dielectric constant 2k.
Capacitor D: side length l, plate spacing 2D, dielectric constant 2k.
What is the conversion of 99.6 f to c ?
99.6°F is equivalent to 37.6°C.
A temperature unit developed from the SI (International System of Units) is Celsius (symbol: °C).
Prior to the adoption of the metric system, Fahrenheit (symbol: °F) was a commonly used measurement of temperature.
To convert Fahrenheit (°F) to Celsius (°C) we have to first subtract 32 from Fahrenheit and then multiply it by .5556 or 5/9.
We have to convert 99.3 degrees Fahrenheit (°F) to Celsius (°C),
We can use the following formula:
°C = (°F - 32) x 5/9
As per the given information,
°F = 99.6
Substituting the value 99.3 for °F, we get:
°C = (99.6 - 32) x 5/9
= 67.6 x 5/9
= 37.6
Therefore, 99.6°F is equivalent to 37.6°C.
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Which statements describe the relationship of Earth and its moon? Check all that apply.
The moon experiences a gravitational force from Earth that is parallel to its motion. In one Earth day, the moon completes one orbit of the planet. The moon's same side is constantly facing Earth.
What kind of rotational relationship exists between the Earth and the Moon?The Moon rotates or spins at the same pace as the Earth and completes one orbit of the planet in 27 Earth days. From our vantage point, the Moon appears to orbit us every 29 days because Earth is orbiting the Sun and revolving on its axis.
What happens to the rate of rotation and revolution of the Earth and the Moon?Due to tidal locking, which synchronizes the moon's rate of spin with its rate of revolution, the moon maintains the same face towards Earth (the time needed to complete one orbit). As a result, the moon revolves precisely once every
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rank the following objects in order of their circular speeds from smallest to largest.
Ranking the objects from smallest to largest circular velocity, we have:
c. a 15-kg object orbiting Earth at the same distance as the Moon (1,022 m/s).
a. a 5-kg object orbiting Earth halfway to the moon (1,681 m/s).
b. a 10-kg object orbiting Earth just above Earth's surface (7,905 m/s).
The circular velocity of an object in orbit depends on its mass, the mass of the central body, and the distance between them. The formula for the circular velocity is V = sqrt(GM/R), where G is the gravitational constant, M is the mass of the central body, and R is the distance between the two objects.
a. The distance between the 5-kg object and Earth is halfway to the Moon, which is about 384,400 km. Therefore, the distance between the object and Earth is 384,400/2 = 192,200 km. Using the formula above, the circular velocity of the object is V = sqrt((6.67x10^-11 m^3/kg/s^2) x (5.97x10^24 kg) / (1.92x10^8 m)) = 1,681 m/s.
b. The distance between the 10-kg object and Earth is just above Earth's surface, which is about 6,378 km. Using the formula above, the circular velocity of the object is V = sqrt((6.67x10^-11 m^3/kg/s^2) x (5.97x10^24 kg) / (6.38x10^6 m)) = 7,905 m/s.
c. The distance between the 15-kg object and Earth is the same as the Moon's distance, which is about 384,400 km. Using the formula above, the circular velocity of the object is V = sqrt((6.67x10^-11 m^3/kg/s^2) x (5.97x10^24 kg) / (3.84x10^8 m)) = 1,022 m/s.
The given question is incomplete, the complete question is
Rank the following objects, in order of their circular velocities, from smallest to largest
a. a 5-kg object orbiting Earth halfway to the moon
b. a 10-kg object orbiting Earth just above Earth's surface
c. a 15-kg object orbiting Earth at the same distance as the Moon
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Two similar spheres A and B, have charges of +2 * 10 ^ -6 * C and + 1 * 10 ^ -6* C The of the electrostatic force on A due to B is 2.4 Newtons. What is the magnitude of electrostatic force on B due to A. Why ?
Show work please and explain.
The magnitude of the electrostatic force on sphere B due to sphere A is also 2.4 N, because the forces are equal in magnitude but opposite in direction as they form an action-reaction pair.
How to find the magnitude of electrostatic force on B due to A?First by Coulomb's Law, the electrostatic force F between two point charges Q1 and Q2, separated by a distance r, is given by
F = k * (Q1 * Q2) / r^2
Where k is the Coulomb constant, which has a value of 9 × 10^9 N·m^2/C^2.
In this case, we have two spheres A and B, with charges +2 * 10^-6 C and +1 * 10^-6 C, respectively. The electrostatic force on A due to B is given as 2.4 N.
To find the electrostatic force on B due to A, we can use Coulomb's Law and the fact that the force between the two spheres is an action-reaction pair, meaning that the forces on A and B are equal in magnitude but opposite in direction. Therefore, the magnitude of the electrostatic force on B due to A is also 2.4 N.
We can see this by rearranging Coulomb's Law as:
F = k * (Q1 * Q2) / r^2
=> Q2 = (F * r^2) / (k * Q1)
where
Q2 is the charge on sphere B, R is the distance between the two spheres, and we have used the known force and charge on sphere A.Substituting the values given, we get:
Q2 = (2.4 N * (1 m)^2) / (9 × 10^9 N·m^2/C^2 * 2 × 10^-6 C) = 0.133 C
Therefore, the magnitude of the electrostatic force on sphere B due to sphere A is also 2.4 N, because the forces are equal in magnitude but opposite in direction as they form an action-reaction pair.
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How to convert 99.4 f to c
The conversion of 99.4 °F(Fahrenheit) is equivalent to 37.44 °C.
A temperature unit developed from the SI (International System of Units) is Celsius (symbol: °C).
Prior to the adoption of the metric system, Fahrenheit (symbol: °F) was a commonly used measurement of temperature.
To convert Fahrenheit (°F) to Celsius (°C) we have to first subtract 32 from Fahrenheit and then multiply it by .5556 or 5/9.
We have to convert 64 degrees Fahrenheit (°F) to Celsius (°C),
We can use the following formula:
°C = (°F - 32) x 5/9
As per the given information,
°F = 99.4
By placing the value 99.4 for °F, we get:
°C = (99.4 - 32) x 5/9
°C = 37.44 (rounded to two decimal places)
Therefore, 99.4 °F is equivalent to 37.44 °C.
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what is r gas constant in atm
The gas constant "R" is a physical constant that relates the properties of an ideal gas to the amount of the gas present, its pressure, volume and temperature.
The value of R depends on the units used for pressure, volume, and temperature.When pressure is measured in atmospheres (atm), volume is measured in liters (L), and temperature is measured in kelvin (K), the value of the gas constant is approximately 0.0821 L·atm/(mol·K).
The exact value of the gas constant R depends on the unit system used. For example, if pressure is measured in pascals (Pa), volume is measured in cubic meters (m³), and temperature is measured in kelvin (K), then the value of R is 8.314 J/(mol·K).
Similarly, if pressure is measured in pounds per square inch (psi), volume is measured in cubic feet (ft³), and temperature is measured in Rankine (R), then the value of R is 10.73 (ft·lbf)/(mol·R).
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What is the lowest frequency of light
The lowest frequency of light that can exist is zero hertz (Hz), which is also known as direct current (DC).
This is because light is a type of electromagnetic radiation that consists of oscillating electric and magnetic fields. These fields oscillate at a certain frequency, and the frequency determines the energy and properties of the light.
However, in the absence of any oscillation, there is no frequency and hence no light. In other words, the lowest frequency of light is no light at all.
It's worth noting that there are other forms of electromagnetic radiation that have frequencies lower than visible light, such as radio waves and microwaves. These types of radiation have frequencies that range from about 3 kilohertz (kHz) to several gigahertz (GHz).
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How to convert 77f to c?
77 F can be converted to C and the value after conversion is 25 C.
The conversion F into C can be done as follows:
As per the given details in the question:
Temperature is Fahrenheit = 77
Temperature is Celsius = to be calculated
The conversion formula used for converting Fahrenheit into Celsius is:
The formula to be used is: (F − 32) × 5/9 = C
Substituting the values in the equation:
(77-32)x 5/9
45x5/9 = 25 C
After conversion of Fahrenheit into Celsius is 25 C.
Temperature can be explained as the degree of coldness and hotness. Temperature has various degrees like Kelvin, Celsius, Fahrenheit.
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what new discoveries from the james webb space telescope can i tell my 9 year old about?
The James Webb Space Telescope sees further back in time, helps study exoplanet atmosphere and study formation of stars.
The James Webb Space Telescope is an exciting new space telescope that is set to launch in December 2021. It will be the largest and most powerful telescope ever launched into space, and it will be able to make some amazing discoveries about the universe. Here are a few things you could tell your 9-year-old about the James Webb Space Telescope:
The James Webb Space Telescope will be able to see further back in time than any other telescope. It will be able to look at the earliest galaxies that formed in the universe, and help scientists learn more about how the universe began.The telescope will be able to study the atmospheres of planets outside of our solar system, called exoplanets. This will help scientists learn more about whether these planets might be able to support life.The James Webb Space Telescope will also be able to study the formation of stars and planets in other galaxies. This will help scientists learn more about how our own solar system was formed.Learn more about space telescope here:
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what sport was banned by europeon missionaries because it was consitered immoral
A.surfing
B.skiing
C.softball
D.Dodgeball
a hard ball moving on a horizontal frictionless surface with a speed of 5m/s in the positive x direction strikes a stationary hard ball of the same mass after the collision the first ball moves with a speed of 4m/s along a direction that makes an angle of 37° with its initial direction of motion what is the struck balls speed and the smallest angle between its direction of motion and the positive x axis after the collision
The struck ball's speed is 4.12 m/s, and the smallest angle between its direction of motion and the positive x-axis after the collision is 28.3°.
What is the ball's speed and its direction?Let's first analyze the conservation of momentum in this collision. Since the collision is perfectly elastic and the surface is frictionless, the momentum of the system (which consists of both balls) is conserved. Therefore, we can write:
m1v1i + m20 = m1v1cos(37°) + m2v2cos(θ)
0 + m1v1i = m1v1sin(37°) + m2v2*sin(θ)
where;
m1 and m2 are the masses of the first and second balls, respectivelyv1i is the initial velocity of the first ball (5 m/s)v1 is the final velocity of the first ball,v2 is the final velocity of the second ball, θ is the angle between the final velocity of the second ball and the positive x-axis.We can simplify these equations using the fact that the masses of the two balls are equal (m1 = m2 = m), which gives:
5m = 4mcos(37°) + vcos(θ)
0 = 4msin(37°) + vsin(θ)
We have two unknowns (v and θ), so we need another equation to solve for both. Since the collision is perfectly elastic, we also have conservation of kinetic energy. We can write:
(1/2)m5^2 = (1/2)m4^2 + (1/2)mv^2
Simplifying this equation gives:
25 = 8 + v^2
v = √17 m/s = 4.12 m/s
Now we can use the first two equations to solve for θ. Dividing the second equation by the first equation, we get:
tan(θ) = -4*tan(37°)/17
θ = -28.3° or 151.7°
The smallest angle between the direction of motion of the second ball and the positive x-axis is 28.3°. This is the absolute value of the negative solution, since angles are measured counterclockwise from the positive x-axis.
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