HELP ASAP PL WILL BE MARKED BRAINLIEST Which of the following is an example of a chemical change?

A piece of paper being cut into multiple pieces
Butter melting after being in the microwave for 30 seconds
Nails rusting over time as they are exposed to oxygen
Sugar dissolving in water

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. the height of the rebound bounce is measured using a scale positioned behind the ball. in the above experiment, which condition would not be controlled? a). the starting height of the ballb). the surface the ball bounces on c). the type of ball d). the method to measure the rebound height of the ball

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be