The acceleration of a particle along a straight line is defined by a=(2t−9)m/s2a=(2t−9)m/s2, where tt is in seconds. At tt = 0, ss = 1 mm and vv = 10 m/sm/s.

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

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Which type of reaction is shown in this energy diagram ?