A 3000 kg freight train traveling at a rate of 2 m/s strikes a stationery 3000 kg freight car and couples up. What is the speed of the 2 cars as they move together after the collision?

What is the measure of a change in an objects velocity?

A heat engine operates at 30% of its maximum possible efficiency and needs to do 995 J of work. Its cold reservoir is at 22 ºC and its hot reservoir is at 610 ºC.

What is a caliper used for? to make a precise measurement of volume to make a temperature measurement with low precision to make a volume measurement with low precision to make a precise measurement of length

If you release a weight and allow it to fall under the influence of gravity alone, what kind of motion will it experience?

A rock is projected upward from the surface of the moon, at time t = 0.0 s, with a velocity of 30 m/s The acceleration due to gravity at the surface of the moon is 1.62 m/s2.

While working out, a man performed 200 j of work in 3 seconds. What was his power?

A funnel-shaped low pressure closure

A rubber rod can be charged negatively when it is rubbed with wool. predict what happens when you rub a copper rod with wool

A copper rod is 0.450 m long. Heat is added to the rod until it expands by 0.00130 m. How much did the temperature change? (Unit=C)

What often happens to light when it travels from one medium to another