How high of a hill should an 80-kg person climb to expend 40,000 joules of energy? A. 4.1 km
B. 4.9 km
C. 51 m
D. 500 m

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers

The law of reflection states that the angle of reflection is equal to the angle of

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