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This is a question about circular motion that also includes some knowledge of Newton's laws. The car is travelling over a curved surface, which you can imagine as part of the circumference of a circle....

Whilst at first this question looks difficult, once broken down it becomes quite easy. It is a simple case of energy exchange.

The pole vaulter gives themselve kinetic energy as they apro...

The phenomenon this question relates to is the photoelectric effect, and it can only be explained using Einstein’s photon model of light.
Electromagnetic waves are emitted in discret...

Stimulated emission occurs under the specific circumstances of a population inversion, that is, when there are more electrons in a higher energy level than one below it. There will be a certain energy ...

We start with the following two observations about an object undergoing constant acceleration. First, its acceleration is equal to the change in its velocity over time, hence,

a=(v-u)/t.<...