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A transformer on a pole near a factory steps the voltage down from 3600 V (rms) to 120 V (rms). The transformer is to deliver 1000 kW to the factory at 87 percent efficiency. Determine values for the following.
(a) the power delivered to the primary
kW
(b) the current in the primary
A
(c) the current in the secondary
an lc circuit consists of a capacitor with c2.90mf and an inductor with l 30.0mh. at t 0 the capacitor has a charge
A 170 object is taken to a height of 360 above the Earth's surface. What is the object's weight at this height
A severe thunderstorm dumped 2.4 in of rain in 30 min on the town of area 21 km2. What mass of water (in kg) fell on the town? One cubic meter of water has a mass of 103 kg.
A barber's chair with a person in it weighs 2100N. The output plunger of a hydraulic system begins to lift the chair when the barber's foot applies a force of 55N to the input piston.
A cubical piece of heat-shield-tile from the space shuttle measures 0.14 m on a side and has a thermal conductivity of 0.065 J/(s·m·C°). The outer surface of the tile is heated to a temperature of 1040°C, while the inner surface is maintained at a..
Cobalt has a saturation magnetization of 1.4 times 106 A/m, and an atomic volume of 6.7 cm3/mole. (a) What is the magnetic dipole moment of each cobalt atom in Bohr magnetons?
A 50 gram ball enters a a pendulum with mass 200 g. The pair then swings up to a height of 12 cm. Find the velocity at which the pair move immediately after the collision
A 3.45 kg mass vertically compresses a spring 67.0 cm before it starts to rebound. How high will the Mass move above the uncompressed
A cockroach of mass m lies on the rim of a uniform disk of mass4.0m that can rotate freely about its center like a merry-go-round.Initially the cockroach and disk rotate together with an angularvelocity of .260 rad/s.
On a frictionless track, a 0.55 kg cart is traveling at 0.70 m/sec when it runs into a spring that is anchored to the end of the track. what is the original kinetic energy of the cart as it approached the spring
A Hydrogen atom has one proton in the nucleus and one electron in the shell. In a classic model of the atom, What is the radius of the orbit
In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots. The horizontal distance between the buildings is 32.0 m, and the heights of the Jackson and Walton ..
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