Which statement best describes the effect nicotine has on the central nervous system

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

If forces acting on an object are unbalanced. true or false

What equation is used to calculate the weight of an object on a plant ?