If the velocity versus time graph of an object is a horizontal line, the object is
a) moving with constant non-zero speed.
b) moving with constant non-zero acceleration.
c) moving with infinite speed.
d) at rest.
e) none of the above

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

Avoltaic cell converts chemical energy to