Aball is dropped from a cliff and falls a distance of 20 m to the ground. determine the velocity it hits the ground at and the time for the ball to fall. a. v = -10 m/s, t = 2 s b. v = 20 m/s, t = 4 s c. v = -20 m/s, t = 2 s d. v = 10 m/s, t = 2 s

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

Infrared rays have a shorter wavelength than question 11 options: x-rays. ultraviolet rays. radio waves. gamma rays.

This punnett square shows the cross between two pants. one parent has round seeds (rr). and the other parent has wrinkled seeds (rr) which best describes their offspring as shown in this cross?