2) A 200-kg boulder is 1000 m above the ground. a)What is its potential energy when it is 1000 m above the ground b) What is its kinetic energy when it is 1000-m above the ground? The boulder begins to fall. What is its potential energy when it is 500- the ground? c)Where did the "lost" potential energy go? d) What is the kinetic energy of the boulder when it has fallen 500 m? e) What is the kinetic energy of the boulder just before it hits the ground

If steel is more dense that lake water, why can a boat float

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

In a series circuit the __ is the same at every point