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When viewed by an observer on the Earth, light from a distantgalaxy is Doppler shifted to the red such that the ratio of the unshifted frequency to the observed frequency is 2.9. What is the galaxy's speed relative to the Earth?
If the create has a mass of 110 and is 1.60 tall and 0.80 in depth and width, what is the minimum force needed to make the crate start tipping? (Assume the center of mass of the crate is at its center and static friction great enough to prevent sl..
A potential difference of 12 V is placed across the ends of a wire of resistance 2.625times10-3 Ohm. If the density of electrons in the wire is 6times1028 electrons/m3 and the cross sectional area of the wire is 2times10-5 m2, what is the drift veloc..
Two people, A and B, with masses of 50-kg and 60-kg, correspondingly, stand on a frictionless surface 10m apart. B pulls on a connecting rope, giving A an acceleration of 0.92m/s2 towards B. a) what is B's acceleration toward A.
A 25 g rifle bullet traveling 270 m/s buries itself in a 4.0 kg pendulum hanging on a 3.0 m long string, find horizontal components of the pendulum's displacement
A portable x-ray unit has a step-up transsformer, the 120 V input of which is transformed to the 100kV output needed by the x-ray tubr, what is the number of loops in the secondary
Two astronauts, each having a mass M are connected by a length of rope of length d have a negligible mass. They are isolated in space, What is the final angular speed of the astronauts
Calculate the probability of finding the electron in the ground state of hydrogen at less than one Bohr radius from the nucleus
A person is riding a bicycle, and its wheels have an angularvelocity of +20.5rad/s. How much time does it take for the bike tocome to rest
q1. a horizontal force of 10 n is applied to the outer edge of a door at an angle of 32deg to the door. the width of
Suppose your waffle iron is rated at 1.20 kW when connected to a 3.00 102 V source. What current does the waffle iron carry
A satellite is in a circular orbit about the earth (M = 5.98 x1024 kg). The period of the satellite is 7.65 x104 s. What is the speed at which the satellite travels?
A helicopter is lifting two crates simultaneously. One crate with a mass of 112 kg is attached to the helicopter by cable A. what is the tension in each of the two cables
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