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An AC power generator produces 51 A (rms) at 3600 V. The voltage is stepped-up to 100,000 V by an ideal transformer, and the energy is transmitted through a long-distance power line that has a resistance of 104. What percentage of the power delivered with the generator is dissipated as heat in the power line?
Two waves are described by the following wave functions y1(x,t) = 3.50 sin (2.00x ? 10.0t) y2(x,t) = 12.00 cos (2.00x ? 10.0t) , find the amplitude and phase of this sinusoidal wave
Horn frequency is 200 Hz, velocity of truck is 20m/s, observer bike's velocity is 10m/s and air temperature is 77 degrees Farenheit. find the frequency at the observer's location
a conducting sphere of radius r1 carries a charge q. another conducting sphere has a radius of r2 2r1 but carries the
The average density of the solar wind at 1 AU is 7protons/cm3 and has an average radial speed of 400 km/s.Assuming that the mass of the solar wind was conserved as it movedaway from the sun and the speed remained constant, estimate themass/second of ..
A toy cannon uses a spring to project a 5.31-g soft rubber ball. The spring is originally compressed by 4.97 cm and has a force constant of 8.09 N/m. At what point does the ball have maximum speed
A certain dam is holding back fresh water 203 m deep. What is the water pressure at the base of the dam
A 70 kg person stands on one foot. If his foot is approximately a(n) 8.0-cm by 30-cm rectangle, what is the average pressure beneath his foot
An object with a mass of 48.0 g displaces 605.0 ml of water when it is completely immersed. What is the buoyant force on the mass
A parallel-plate aircapacitor of area A = 17.3 cm2 and plate separation of d= 3.80 mm is charged by a battery to a voltage of 60.0 V. What is the charge on the capacitor?
A block of ice slides 500 m down along a frictionless slope (slopes 20 degrees below horizontal). what is blocks speed at end of slop
two blocks are attached over a massless frictionless pulleyinitially the left mass5kg is touching the floor the
What is the minimum work needed to push a 950kg car 810m upalong a 9.0 degree incline
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