Sound waves require a medium to travel through, such as a solid, liquid or gas because
a) waves cannot move through a vacuum.
b) sound only works within certain pressures.
c) waves only work within certain temperatures.
d) sound is molecules bumping into one another.

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.

question answered by

(jacemorris04)