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When viewed by an observer on the Earth, light from a distant galaxy is Doppler shifted to the red such that the ratio of the unshifted frequency to the observed frequency is 2.1. What is the galaxy's speed relative to the Earth?
A source of electromagnetic waves radiates power uniformly in all directions at a single frequency. At a distance of 5.00 km from the source, What is the average power radiated by the source
The positioin of a particle moving along the x-axis is given by x =( 21+22t-6t^2)m, where t is in s. What is the average velocity during the time interval t= 1.0 s to t = 3.0s
At a recent rock concert, a dB meter registered 130 dB when placed 1.50 m in front of a loudspeaker on the stage. What was the power output of the speaker
A Ferris wheel is moving at an initial angular velocity of 1.0 rev/54 s. If the operator then brings it to a stop in 3.4 min, what is the angular acceleration of the Ferris wheel
A 0.19 kg meterstick has a 0.17 kg mass at its 40 cm mark and a 0.45 kg mass at the 85 cm mark. Where should the fulcrum be so the meterstick is balanced
The largest constant magnetic field achieved in the laboratoryis about 40 T. What is the magnetic energy density due to this field
A 166 gram hockey puck has a initial velocity of vx = 27 m/sec and vy = 16 m/sec. What is the impulse delivered to the hockey puck in the x direction
q1. when a surface is irradiated with light of wavelength 4950 a a photo current appears that vanishes if a retarding
Above the surface of the Earth, the magnitude of the acceleration due to gravity is inversely proportional to the square of the distance from the Earth's center.
A uniform plank of length 5.8 m and weight 217N rests horizontally on two supports, with 1.1m of the plank hanging over the right support. To what distance x can a person who weighs 460 N walk on the overhanging part of the plank before it just beg..
In a PCM system, the number of quantization levels is 16 and the maximum lsignal frequency is 4 kHz, the bit transmission rate is
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
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