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An ac generator supplies 20 A at 440 V to a 10,000 V power line. If the step up transformer has 150 turns in its primary coil, how many turns are in the secondary coil?
A certain atom of has 77 protons. Assume that the nucleus is a sphere with radius 6.73 fm and with the charge of the protons uniformly spread through the sphere. At the nucleus surface what is the magnitude of the electric field produced by the proto..
The intensity of a cylindrical laser beam is 0.800 {rm W}/ {rm m} ^ {2}. The cross-sectional area of the beam is 3.0 times 10^ {- 4} {rm m} ^ {2} and the intensity is uniform across the cross section of the beam.
On a frozen pond, a 9 kg sled is given a kick that imparts to it an initial speed of v0 = 2.2 m/s. find the distance the sled moves before coming to rest
A hydrogen atom in a state having a binding energy (the energy required to remove an electron) of 0.544 eV makes a transition to a state, What is the energy of the photon emitted as a result of the transition
question1the bumper car with mass m1 109 kg is moving to the right with a velocity of v1 4.9 ms. the second bumper
You and your friend Peter are putting new shingles on a roof pitched at 25?. If the coefficient of kinetic friction between the box and the roof is 0.51, with what speed should you push the box to have it gently come to rest right at the edge of th..
In a Young's double-slit experiment the wavelength of light used is 476nm (in vacuum), Determine the angle that locates the dark fringe for which m = 0
A typical American house requires an average 20 kW for heating. Explain how many homes could be heated with the waste heat of this one power plant?
It continues to fly along the same horizontal arc, but increases its speed at the rate of 1.45 m/s2. Find out the acceleration in this situation at the moment the hawk's speed is 4.60 m/s.
Modern medical imaging can do much more than take a simple x-ray. Define and explain four methods that are used for medical imaging. Explain the physics behind these techniques, describe what they measure, and say something about the applicatio..
A block with mass mA = 11.0kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 6.0kg which hangs vertically
at what distances from the speaker do you hear a minimum sound intensity.
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