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An A.C. generator which produces an RMS voltage of 120 V at 60 Hz is connected to an 8 H inductor. There are no other elements in the circuit. How is the phase of the current through the inductor related to the phase of the voltage?
A 3500 kg parked car, with brakes off and free to move, What percentage of the kinetic energy is lost in the collision
A glass plate having parallel faces and a refractive index of 1.54 lies at the bottom of a liquid of refractive index 1.62. Compute the angle of refraction of this light in the glass
what is the displacement amplitude of sound with frequency f 1.5 khz and intensity level 90 db. take the speed of
question a student in a parked car honks the horn which has a proper frequency of 310 hz. an observer in an approaching
Two parallel wires 10 cm apart carry currents of 18 A. What is the magnetic force between two wires for both case
a performer seated on a trapeze is swinging back and forth with a period of 8.85 s. if she stands up thus raising the
Water waves in a lake travel 3.77 m in 2.09 s. The period of oscillation is 1.5 s.What is the speed of the water waves? Answer in units of m/s.
Two identical small insulating balls are suspended by separate 0.256 m threads that are attached to a common point on the ceiling. Each ball has a mass of 8.09E-4 kg. Initially the balls are uncharged and hang straight down.
In Oersted's experiment, suppose that the compass was 0.27 m from the current-carrying wire. If a magnetic field of 1/4 the Earth's magnetic field of 5*10-5 T was required to give a noticeable deflection of the compass needle, what current must the w..
In order better to map the surface features of the Moon, a 379-kg imaging satellite is put into circular orbit around the Moon at an altitude of 1.21 × 10^2 km. Calculate the satellite\'s gravitational potential energy
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1330 Hz. The bird-watcher, however, hears a frequency of 1410 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
A wire of unknown material has a cross-sectional area 7 mm2 and length 15 cm. What is the resistivity of the unknown material
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