A box of mass mis held on top of an inclined plane of height h. Friction between the inclined plane and the box is negligible.

The box slides down the plane until it reaches ground level with a speed of vms. It continues sliding
along the ground, which has a coefficient of friction of y, until it comes to a complete stop after a distance of s metres.

What is the correct expression for the coefficient of friction?

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.