What does it mean to be an exothermic chemical reaction? a) Energy is released when no new substances are made. b) Energy is released when new substances are made. c) Energy is absorbed when no new substances are made. d) Energy is absoebed when new substances are made. e) None of the choices are correct.

i need mutiple choices

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

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(jacemorris04)