The conical fiask contains compound X which is present in solid , liquid and gaseous states . Which statement is correct ? A. A gaseous X molecule has a lower mass than a liquid X molecule .
B. Energy is released when X changes from liquid to solid.
C. Liquid X is at a higher temperature than solid X. D. Liquid X molecules vibrate about fixed positions .

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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)