A monkey throws a coconut horizontally from the top of a tree. At the same
time, the branch he is standing on breaks. The monkey and the branch fall
straight down. Which of the following is true?

A. The branch will reach the ground first

B. the monkey will reach the ground first

C. The coconut will reach the ground first

D. The monkey, the branch, and the coconut will reach the ground at the same time.

An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?

How is the ideal mechanical advantage of a wheel and axle calculated?