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The frequency of light reaching Earth from a particular galaxy is 8% lower than the frequency the light had when it was emitted. What is the speed of this galaxy relative to the Earth? Give your answer as a fraction of the speed of light
Two small metallic spheres, each of mass 0.20g, are suspended as pendulums by light strings from a common point.
Two radio antennas are separated by 2.00 m. Both broadcast identical 750MHz waves. If you walk around the antennas in a circle of radius 10.00 m, how many maxima will you detect.
suppose that the engineer is at x = 0 when, at t = 0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided. Do this on paper. Your ins..
An electron is projected vertically upward with a speed of 1.65x10^6 m/s into a uniform magnetic field of 0.160 T that is directed horizontally away from the observer. What would the radius of the circle be.
A wheel 65 cm in diameter accelerates uniformly from 230 rpm to 355 rpm in 7s. How far will a point on the edge of the wheel have traveled in this time.
A spool of thin wire (with inner radius r = 0.50 m, outer radius R = 0.65 m, and moment of inertia I_cm = 1.1323 kg*m2) pivots on a shaft.
What is the wavelength of the electromagnetic waves used for cell phone communications in the 900-MHz band?
A satellite revolves around a planet at an altitude equal to the radius of the planet. The force of gravitational interaction between the satellite and the planet is F_0. Then the satellite moves to a different orbit, so that its altitude is tripl..
Find the electric field strength from the wire. How long is each spring when hanging as shown.
A toroidal solenoid has a mean radius of 10.0cm and a cross-sectional area of 4.8cm2 and is wound uniformly with 115 turns. What is the mutual inductance of these coils
Find the maximum weight for the car if the springs should be compressed no more than 4.2 cm when the car is at rest
An object attached to a horizontal spring is oscillating back and forth along a frictionless surface. The maximum speed of the object is 1.25m/s.
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