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Power lines at 20,000V (rms) are connected to a utility pole transformer. The output of the transformer's secondary, which leads to a residence, is at 240V (rms). Find the ratio of the number of turns in the primary to the number of turns in the secondary.
An electron accelerated from rest through the voltage of 500V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 17cm, what is the magnitude of magnetic field.
A 3.60 long, 420 steel beams extends horizontally from the point where it has been bolted to the framework of the new building under construction. A 72.0 construction worker stands at the far end of the beam. What is the magnitude of torque about the..
A 211-? and a 221-? resistor are connected in series across an unspecified power supply, what is the exact current (in A) through the 221-? resistor
Modeling the optical trap as a Hookean spring, evaluate the trap stiffness using the Boltzmann distribution. Determine the sphere diameter by comparing the Stokes drag and the tweezer force that balances the drag.
What is the piston height if the temperature is 30C. How far apart are the plates if there's air between them.
Mike pulls a sled across level snow with force of 235 N along a rope that is 35.5° above the horizontal. If the sled moved the distance of 75.0 m, how much work did Mike do.
A 8.80-g bullet has a speed of 1.17 km/s. What is the bullet's kinetic energy if its speed is halved
A person walks 25.0 north of east for 3.10 km. explain how far would another person walk due north and due east to arrive at the same location?
A bicycle and rider have a combined mass of 100 kg. How many calries of heat are generated in brakes when the bicycle comes to a stop from a speed of 36 km/h.
On a banked race track, the smallest circular path on which cars can move has a radius of 112m, while the largest has a radius of 165m, as the drawing illustrates. The height of the outer wall is 18m. The largest speed at which cars can move on thi..
A uniform electric field of magnitude 249 V/m is directed in the negative y direction. A +13.4 ?C charge moves from the origin to the point (x, y) = (15.0 cm, 50.8 cm)
An abstract sculpture is constructed by suspending a sphere of polished rock along the vertical with four cables connected to a square wooden frame 1.1 m on a side. If the stone has mass m = 7.5 kg, and the bottom two cables are under a tension of..
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