Jen, cruising along on her moped at 12.5m/s, suddenly runs out of gas at the base of a hill.
a. If she and the moped have a mass of 150kg combined, what is their kinetic energy?
b. At that speed, how high of a hill could she climb?
c. If the hill in front of her is 15m high, how much work would she have to do to get to the top?

Help please!!!

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical