The spectrum produced by a prism or a raindrop is evidence that the average speed of light in the material depends on the light'
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Answer: D
Explanation: Look at the figure, we can conclude that the correct answer is
X: Low potential energy
Y: High potential energy
Z: Flow of electrons
Because electrons flow where there is difference in potential energy. And electrons move from a region of high potential energy to a region of low potential energy.
Since the arrow is pointing to X, that means
Z is the flow of electrons, X is of low potential energy and Y is of high potential energy.
The spring exerts on each block an outward force of magnitude
The kinetic energy is the energy that it possesses due to its motion.
To accelerate an object, we need to apply force. To apply force, we have to be compelled to do work. When work is done on an object, energy is exchanged, and the object moves with a unused steady speed. We call the energy that's exchanged kinetic energy, and it depends on the mass and speed accomplished.
Kinetic energy is a scalar quantity, it is entirely described by magnitude
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