Which of the following systems has constant kinetic and potential energies? a car moving along a level road at constant speed
a car moving up a hill at constant speed
a car moving down a hill at constant speed
all of the above

An object's buoyant force and weight mean the same thing. a. trueb. false

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?

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.