An apple falls (from rest) from a tree. it hits the ground at a speed of about 4.9 m/s. what is the approximate height (in meters) of the tree above the ground? the magnitude of the gravitational acceleration g = 9.8 m/s2 enter your answer in meters. keep 2 decimal places.

Which symbol in the first law of thermodynamics represents the sum of the chemical and thermal energy stored in atoms and molecules? a. q b.w c.v d.u

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.

Which planets are visible without a telescope