Does any one else just wanna cry and drown in the tears?? just me...ok

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

Need only answer if you think you know it

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?