In a department store, a person takes an escalator from the 2nd to the 3rd floor. Describe the movement in three different frames of reference.

Calculate the heat capacity per object when the total energy is 4 quanta. (think of this in terms of increasing from 3.5 quanta of energy in the system to 4.5 quanta of energy in the system, if that were possible.) c4 = __ j/k/object

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?