In an insulated vessel, a quantity of hot water at temperature t1 is mixed with a different quantity of cold water at temperature t2. after equilibrium is established, the vessel contains

What energy transformations occur each time the skateboarder rolls up the ramp?

How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?

The cheetah is considered the fastest running animal in the world. cheetahs can accelerate to a speed of 20.1 m/s in 2.50 s and can continue to accelerate to reach a top speed of 28.1 m/s. assume the acceleration is constant until the top speed is reached and is zero thereafter.1) starting from a crouched position, how long does it take a cheetah to reach its top speed? (express your answer to three significant figures.) s2) how far does it travel in that time? (express your answer to three significant figures.) m3) if a cheetah sees a rabbit 120 m away, how long will it take to reach the rabbit, assuming the rabbit does not move? (express your answer to three significant figures.)