Can somebody help me. Will mark brainliest.

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

The semi-conductors on the periodic table are classified as

Name 3 types of energy you see being used as you look around a classroom