Which scientist's work led to our understanding of how planets move around the sun?

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

The two required components for a generator

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery