Cooling water from a river flows through the condenser (the low-temperature heat exchanger) at the rate of 1.2×108L/h (≈30 million gallons per hour). If the river water enters the condenser at 18∘C, what is its exit temperature?

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?