Two cars drive down the highway. the lead car has a constant velocity of 72 km/hr and is 50 km head of the trailing car that's going 80 km/hr. how much time does the trailing car need to catch up ?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)