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A resistance R and a 3.4-H inductance are in series across a 60-Hz ac voltage. The voltage across the resistor is 34 V and the voltage across the inductor is 39 V. Assume that all voltages in this problem are rms voltages. (a) What is the resistance R? (b) What is the ac input voltage?
What is the critical angle for light at the glass-liquid interface when the glass with n = 1.54 is immersed in water
A ball is kicked with an initial velocity of 15 m/s in the horizontal direction and 14 m/s in the vertical direction. For how long does the ball remain in the air
Suppose two kids get on a 4 meter long teeter-totter. The one on the right creates a CW torque of 350 Newton-meters (Nm). Quite by coincidence, when the other kid sits at 1 meter from his end they balance perfectly. How much does second kid weigh.
Imagine you are pushing a 15 kg cart full of 25 kg of water up a 10 degree ramp. If the coeff. of friction is .02, what is the total force needed to push it up the ramp
A two meter long string is wrapped around the outside edge and the ring is dropped allowing the string to unwind as the ring falls. Find the speed of the ring after it reaches the end of the string
A 500 kg cart is at the top of a steep track. It rolls from rest down a 7 meter hill. How much potential energy does it have at the top of the hill
A cube with the side length 1.53 meters of solid styrofoam is completely submerged in fresh water such that the top of the styrofoam block is parallel to the water surface and is 2.55 meters beneath the surface
Two trains, each having a speed of 28 km/h, are headed at each other on the similar straight track. A bird that can fly 56 km/h flies off the front of one train, when they are 66 km apart and heads directly for the other train. On reaching the other ..
In a photoelectric effect experiment, a metal sample is illuminated by 10.0 mW of ultraviolet light of wavelength 240 nm. What is the longest wavelength of light that can knock electrons out of this metal
An electron is accelerated through an electric potential of 123 V, then enters a 29 Gauss magnetic field in a direction at a right angle to the velocity. Find the radius in cm of the subsequent circular path for this electron. Express the answer with..
A Toyota Prius driving north at 56.0mph and a VW Passat driving south at 38.0 mph are on the same road heading toward each other, What is the velocity of Toyota Prius relative to the VW Passat
Two identical converging lenses have focal lengths of 15 cm and are aligned on the same principal axis. What is the total magnification of the two lenses
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