As a sound wave travels from liquid water into ice, its wavelength would
a) decrease due to wave speed decreasing as it passes through the ice.
b) increase because the wave speed and frequency have increased.
c) decrease since the frequency is now lower.
d) increase in order to keep the frequency the same due to the increase in speed.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

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?

Employer informs its employees that it will hold a substantial cash prize drawing for each work group at the end of each month in which no employee in the work group sustains a lost-time injury. tyra reports an injury that she sustained while operating a mechanical power press. tyra did not violate any employer safety rules when she sustained her injury. tyra’s injury requires her to miss work for two days. her employer cancels the cash prize drawing for that month for tyra’s work group because of tyra’s lost-time injury. did the employer misuse an incentive program to retaliate against tyra?