Suppose it takes 4 erg of work to stretch a spring 10 cm beyond its natural length. How much more work is needed to stretch it 4 cm further?

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

Iwill give brainliest if you answer right : )

Name the non metal condut electricity