A substance changes state from solid to liquid. What has happened? (2 points) A physical change
A chemical change
A chemical reaction
The creation of matter

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative