Aball is dropped from a boat so that it strikes the surface of a lake with a speed of 16.5 ft/s. while in the water, the ball experiences an acceleration of a = 10 – 0.8v, where a and v are expressed in ft/s2 and ft/s, respectively. the ball takes 5.7 s to reach the bottom of the lake.

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

Organ systems work to maintain homeostasis by creating energy to allow systems to function, releasing hormones to create or end body reactions, and eliminating waste to prevent illness. t or f