A 0.4 kg ball is loaded into a spring of stiffness constant 65N/m. It is compressed .12m before being released. The ball travels the path shown above. How far along the lower level does the ball travel if the force of friction acting on it is 3.5N on along the lower level? Assume all other parts of the path are frictionless.

Which atomic model was proposed as a result of j. j. thomson’s work?

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

1) what is the power in horsepower of a 100 watt light bulb? what is the power in kilowatts of a 200 horsepower engine? 2) if a cars engine is providing 3000 n of force to keep the car moving at 5 m/s, what is the engine’s effective power? 3) how many gallons of water will be pumped from a well 30 feet deep by a 1/2 hp engine in 1 minute? (1 gallon weighs 8.34 pounds)