If a substance has a large mass and a small volume, what can you conclude about it? It's very dense It's very dense It will float on water It will float on water It is made out of rock or metal It is made out of rock or metal It is made out of rock or metal It is made out of rock or metal

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?