In the case of unlike magnetic poles unlike electric charges

The ph of your mouth is very similar to that of stomach. true or false?

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

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.