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The input piston and output plunger of a hydraulic car lift areat the same level, as shown in the drawing. The cross-sectionalarea of the input piston is 12 cm2, while that of theoutput plunger is 1200 cm2. The forceF1 applied to the input piston has amagnitude of 130 N. What is the weight W of the car? Neglect the weight of the piston and plunger.
Two capacitors have the same plate separation, but one has square plates and the other has circular plates, at is the dielectric constant kcircular of the material between the circular plate
A 65.0 kg human sprinter can accelerate from rest to 10 m/s in 2.90 s. all through the same interval, a 33 kg greyhound can accelerate from rest to 20 m/s. calculate (a) change in kinetic energy and (b) average power output for each.
A skier of mass 106 kg travels down a frictionless ski trail. If the top of the trail is a height 206 m above the bottom, what is the work done by gravity on the skier
Air in a balloon does 46 J of work while absorbing 94 J of heat. What is the change in internal energy
An entertainer, when performing a bubble trick, forms one bubble inside another. The surface tension of the bubble liquid is ?=0.04 N m-1. What is the gauge pressure in the inner bubble
A hollow ball is rolling along a horizontal surface at 3.2m/s when it encounters an upward incline. If it rolls without slipping up the incline
A 169 g cube of ice at0?C is dropped into 2.9 kg of water that wasoriginally at 79?C. What is the final temperature of the water after after the ice melts
an oil film n 1.46 floating on water is illuminated by white light at normal incidence. the film is 283 nm thick.a
A sphere of mass M is supported by a string that passes over a pulley at the end of a horizontal rod of length L, Find the mass of the portion of the string above the rod
A device operates in a three process cycle. In process one, the device receives 35kJ of heat and does no work. Determine the COP or efficiency as applicable
A resistor with R = 1.5 k? is connected to an AC generator that operates at 60 Hz with an amplitude of 49 V. (a) Find the amplitude of the current through the resistor.
A person is losing thermal energy through the skin at a rate of 120 W when his skin temperature is 30°C. find At what rate is he now losing thermal energy
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