If the flow of charged particles in some region of space includes electrons moving to the right and positive ions moving to the left, which direction is the current?

a. to the right
b. to the left only if the positive ions are doubly ionized or more
c. the current is zero
d. to the left cannot be determined without more information

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus

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?

What is the answer to these problems 30 pt