Which of these is a chemical of a pure substance
melting point '
color
boiling point
reactivity

Write a question about how changing temperature affects the gas inside the sports ball

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?