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A force of 250 N is applied to a hydraulic jack piston that is0.01 m in diameter. If the piston which supports the load hasa diameter of 0.10 m, approximately how much mass can be lifted. Ignore any difference in height between thepistons.
A person weighing 119 pounds can run up 500 steps, How much power did the person expend running up the steps
An empty boat is placed in a freshwater lake and a mark is painted on the hull at the waterline, a line corresponding to the surface of the water when the vessel is floating upright, where is the new waterline mark located on hull of the boat
A model rocket rises with constant acceleration to a height of 3.8 m, at which point its speed is 24.0 m/s. How much time does it take for the rocket to reach this height
A balloon contains 0.63 mol of helium. It rises, in maintaining a constant 280 K temperature, to an altitude where its volume has expanded three times. How much work is done by the gas during this isothermal expansion?
A ball is thrown so that its initial vertical and horizontal components of velocity are 60 m/s and 15 m/s, respectively. Estimate the maximum height the ball reaches
A train siren indicating that the stationary train is ready to leave the station has a frequency of 80 Hz. What frequency is perceived by the occupant of a car traveling away from the train at 30 m/s? The speed of sound in air is 343 m/s.
Suppose you stir 1 kg of water until its temperatue raises by 1 degree C. How much work did you do on the water
Two metal electrodes of size 2.0 cm \times 2.0 cm are spaced 1.3 mm apart and connected by wires to the terminals of a 9.0 {\rm V} battery. What is the charge on each electrode? What is the potential difference between electrodes?
A 500 g wooden block is lowered carefully into a completely full beaker of water and floats. What is the weight of the water, in newtons, that spills out of the beaker
If a 37.2N horizontal force must be applied to slide a 15.8kg box along the floor at constant velocity what is the coefficient of sliding friction between the two surfaces.
Discuss displacement versus distance moved for an object and illustrate with examples. Define Inertia and explain its consequences on motion
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0°C and rejects heat to a room at 22.5°C. How much heat is discharged into the room
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