A cheetah ran 201m in 9.1s. What is the cheetah’s velocity when it is running towards its prey?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air