Aball starts from rest. it rolls down a ramp and reaches the ground after 4 seconds. its final velocity when it reaches the ground is 7.0 meters/second.

this is part you put the answer the initial velocity of the ball is meters/second, and its acceleration is meters/second2.

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Aquantity of gas has a volume of 1.5 m3 and an absolute pressure of 95 kpa. when the gas is compressed to a volume of 0.5 m3, what is the new absolute pressure of the gas? (assume that there’s no change in temperature.)

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?