Help Which of these interactions would transfer kinetic energy between two objects?

Select one

When a car increases its speed

When a car burns gasoline

When a car hits another car

When a car hits a speed bump

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?

Disney, viacom and aol time warner are examples of