Which equation can be used to calculate the normal force on an object if you know the speed of the object, the coefficient of kinetic friction, and the force
of kinetic friction on the object?
Friction
O A. FNE
B. FN
ул.
Ffriction
O C. FM
Ffration
D. Fw-Ffrica
friction

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?