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(a) Find the useful power output of an elevator motor that lifts a 2500 kg load a height of 45.0 m in 12.0 s, if it also increases the speed from rest to 4.00 m/s. Note that the total mass of the counterbalanced system is 10000 kg--so that only 2500 kg is raised in height, but the full 10000 kg is accelerated.
How much heat must be added to 1 mole of a monatomic gas if the temperature goes to -10.0 degrees C to 30.0 degrees C at A) constant volume B) constant pressure?
consider a system consisting of 3 charges. a 1 c charge is located at x 0 a 2 c charge is located at x 2 cm and -1 c
A laser with a power output of 2.10 mW at a wavelength of 425 nm is projected onto calcium metal. Given the binding energy is 2.28 eV, how many electrons per second are ejected
A 12-gram bullet is fired at 1600 m/sinto the wooden block of a ballistic pendulum, causing it to swingback, raising up 1.40 meters vertically. Find the mass of the block.
While driving at a constant speed of 66 km/h, you are passed by a car traveling at 120 km/h. The frequency of light emitted with the taillights of the passing car is 4.3 multiplied by 10 14 Hz. discover the change infrequency of this light when it ..
When an electron moving through air has 5 MeV of energy, what is the ratio of the rates of energy loss by bremsstrahlung to that by collision? What is this ratio for lead?
What is the difference between alternating current and direct current induction motors? Which motor do you think would be best to use on large pieces of equipment? Explain your choice.
a person who weighs 628 n is riding a 91.6 n mountain bike. suppose the entire weight of the rider and bike is
A train 400m long is moving on a straight track with a speedof 82.4 km/h. determine how long the train blocked the crossing
A juggler throws a ball straight up into the air and it takes 3 seconds to reach its peak. Determine how many seconds will it take after that to fall back into his hand? Suppose he throws and catches the ball at the similar height
What is the potential difference between points D and A - What is the workdone when a point charge q = 2 nC is carried from A to B?
A star is about 6.00 light years from Earth. How long would the trip take according to an Earth based observer
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