In order to determine speed, you must know
a. time.
c. both
a. and
b. b. distance.
d. none of the above

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?

The substances that are necessary for producing of certain hormones and that store and transport vitamins