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An AC power generator produces51A (rms) at 3600 V. The voltage is stepped up to 100000 V by an ideal transformer, and the energy is transmitted through a long-distance power line that has a resistance of96. What percentage of the power delivered by the generator is dissipated as heat in the power line?
Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, hip's speed at impact is about 2. If this can be reduced to 1.30 or less, hip will usually not fracture. One way to do this is by wearing elasti..
q1. the pulley system is used to lift a 61 kg crate. note that one chain connects the upper pulley to the ceiling and a
A drag racer starts her car from rest and accelerates at 10 m/s for the entire distance of 400m. What is the speed of the race car at the end of the run
A uniform rod of length 0.790 m and mass 14.50 kg is balanced on a sharp edge at 0.650 m from the left end. At the left end hangs a mass of 45-kg and the right end hangs an unknown mass so that the whole assembly is in equilibrium.
The efficiency of a knife is 75%. If you push down on the knife with a force of 5 N to cut a piece of cake that is 6 cm thick, how much work is done on the cake
Water flows through two garden hoses. The large diameter hose is connected to the end of the small diameter hose. How are the pressures in the two hoses related
At t = 0, an automobile travelling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.70 m until, at t = 1.60s, it is travelling east. The car does not alter its speed all through the turn.
Write the general equation of Magnetic force on a current carrying wire of length L in a magnetic field B such that the magnetic field and the current direction make an angle different than 0^0 and 180^0
Water is moving with a speed of 24.8 m/s through a pipe with a cross-sectional area of 3.0 cm2. What is the speed of flow at the lower level
A point charge with a charge q1 = 2.60?C is held stationary at the origin. How much work is done by the electric force on q2
A golf ball of mass 0.045 kg is hit off the tee at a speed of 35m/s . The golf club was in contact with the ball for 3.90×10?3s. Find the impulse imparted to the golf ball
What is the maximum electric field magnitude between the cylinders?
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