Substances change state when they move between solid, liquid, and gaseous forms. What happens to a substance when it changes from one
state to another?

A. A reduction in mass

B. An increase in mass

C. A chemical change

D. A physical change

1. they vary with a higher number because boiling is way hotter than melting

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)

explanation:

a