g Under ordinary conditions, gases have indices of refraction only a little greater than thatofvacuum, i.e.,n=1+ε,whereεissome small number. Suppose that a ray crosses a boundary between a region of vacuum and a re- gion in which the index of refraction is 1 + ε. Find the maximum angle by

A12-kg bag of groceries is tossed onto a table at 4.0 m/s and slides to a stop in 2.2 s . modify the equation fδt=δ (mv) to find the force of friction.

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?

Which best describes the difference between internal and thermal energy?