which is true of a mechanical wave?

1. both sound and light are examples.
2. it can travel in a vacuum.
3. it must have a medium.
4. it must travel in empty space.

Displacement is the slope of a velocity vs. time graph a. true b. false

Malia was able to make a paper clip float on the surface of water what will most likely happen to the paper clip if a drop of dishwashing detergent is added near it

Nthis lab, you will do experiments to identify types of changes. using the question format you learned (shown above), write an investigative question that you can answer by doing these experiments