What is its characteristic wavelength? [Hint: Recall that the kinetic energy of a moving object is E=12mv2, where m is the mass of the object and v is the speed of the object.]
Answers
Answer:
λ =
Explanation:
Using the De Broglie equation, the characteristic wavelength is given by:
λ =
where
h = Planck's constant = Js.
p = momentum
Momentum, p, can be calculated using:
p =
where
m = mass of the electron = kg
E = Energy of the electron = 13.4 keV = J =
J
=> p =
p =
p = kgm/s
Therefore, characteristic wavelength, λ, is:
λ =
λ =
In physics, the characteristic wavelength is the wavelength associated with an object's kinetic energy. It can be determined using the equations for energy, frequency, and wavelength.
In physics, the characteristic wavelength refers to the wavelength associated with a moving object's kinetic energy. The kinetic energy of an object is given by 1/2mv², where m is the mass of the object and v is its speed.
When an object's kinetic energy is known, we can use the equation E = hf, where E is the energy, h is Planck's constant, and f is the frequency of the wave associated with the object, to find the characteristic wavelength.
The equation is rearranged to solve for f, and then the frequency is used to calculate the wavelength using the formula λ = c/f, where λ is the wavelength and c is the speed of light.
By plugging in the given values of the object's mass and speed, you can determine its characteristic wavelength using these equations.
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You take a running jump off the end of a diving platform at a speed of 7 m/s and splash into the water 1.5 seconds later.a.) How far horizontally do you land from your takeoff point?b.) How high is the diving platform?
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two plane mirrors are at right angles to each other. a man stands between them and combs his hair with his right hand. in how many of the images will he be seen using his right hand? none 1 2 3
B. a liquid.
C. a gas.
D. both b and c
Answers
Answer:
Solids
Explanation:
Solids have definite shapes and definite volumes. The forces of attraction between the molecules of a solid substance are strong and the intermolecular spaces are very small. Due to this, the motion of molecules within a solid substance are very difficult that they only vibrate in their positions.
For liquids, they have definite volumes and indefinite shapes. The forces of attraction between the molecules of a liquid are intermediate and the the intermolecular spaces are intermediate as well. Due to this, the motion of molecules within a liquid substance is not as difficult as it is within solids.
Finally, for gases, they have indefinite shapes and indefinite volumes. The forces of attraction between the molecules of a gas are weak and the intermolecular spaces are large. Due to this, the motion of particles of gas is very easy.
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Final answer:
The forces of attraction limit the motion of particles most significantly in solids because particles in a solid are closely packed and have stronger forces of attraction, which hold them tightly in fixed positions.
Explanation:
The forces of attraction between particles limit motion most significantly in a solid (Option A). In a solid, particles are closely packed together and have the least amount of freedom to move, compared to particles in a liquid or gas. This is because the forces of attraction in a solid are very strong, holding particles tightly in fixed positions. In contrast, particles in liquids and gases have more freedom to move as the forces of attraction are weaker.
However, this does not mean that particles in a liquid or gas do not experience forces of attraction. They do, but the forces are weaker in comparison to solids, allowing for more movement. Hence, solids are the state of matter in which forces of attraction limit the motion of particles most.
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height?
(1) 0.0 N (3) 5.0 N, down
(2) 5.0 N, up (4) 9.8 N, down
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If the ball weighs 5 newtons, then that's the force of gravity that
attracts it to the center of the Earth. The force only depends on
the mass of the ball and its distance from the center of the Earth.
The force of gravity doesn't care whether the ball is moving or at
rest. It doesn't change significantly until the ball moves to some
significant distance off the Earth's surface, which isn't happening
if it's tossed by a human being.
So we have a downward force of 5 newtons on the ball at all times.
In order to find the net force on it, we have to identify any other
forces besides gravity that are also acting on it.
If the ball were moving through the air, then there would be a force
of air resistance on it, acting opposite to its motion. But when it's
at its maximum height, in the process of turning around from rising
to falling, there's an instant when it's not moving through the air at all,
so gravity is the only force acting on it. At that moment, the net force
on the ball is 5.0 newtons downward.
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Here are the following choices:
A) up
B) down
C) to your left
D) to your right