Which describes a force acting on an object?
O a billiard ball that rolls at a constant speed
a ball that moves when kickell
O a car moving in a straight line

An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 6.0 v for 0.65 ms. the resistance of the heart muscle between the pacemaker’s electrodes is 550 ω. find (a) the current that flows during a pulse, (b) the energy delivered in one pulse, and (c) the average power supplied by the pacemaker.

Most short-period comets do not have randomly oriented orbits because

What does si stand for, when referring to a system of measurement