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astronomers have recently measured the rotation of gas around what might be a supermassive black hole of about 2 million solar masses at the center of a galaxy. if the radius of the galactic center to the glass clouds is 60 light years, what doppler shift do you estimate they saw?
An atom of mass 3.32*10^(-26)kg oscillates in one dimension at a frequency of 10^13Hz, calculate the quantized energy levels
business equipment for a $5,000 loss, stock investment for a $7,000 loss, and her principal residence for a $16,000 loss. Presuming adequate income, explain how much of these losses may Joan claim on her 2011 return?
A golfer tosses a golf ball straight up into the air and itreturns to his hand 1.5 seconds later. what was the initial velocity of the tossed ball?
A wheel with a radius of 20 cm rotates constantly counter-clockwise once every 5 s. What is the centripetal acceleration of the wheel rim
A charged particle moves 19 mm in electric field with magnitude of 242 N/C If electrical potential energy of moving charge decreases by 91.3 x 10^-19 J due to this motion what is the charge of this moving particle
Two masses are connected by a string as shown in the figure. Mass = 2.1 rests on a frictionless inclined plane, what will be the resulting acceleration of the masses
The hydrogen bomb detonated in 1954 had an explosive power equal to about 15 megatons of TNT, How many times more explosive was the hydrogen bomb
A sphere of conducting material has an empty hollow cavity within it and a net charge of Q=+5 distributed over its surfaces. What is the magnitude of the electric field within the hollow cavity
A man lost in a maze makes three consecutive displacements so that at the end of his travel he is right back where he started. find the magnitude and direction of the third displacement
The Hubble Telescope orbits the earth in a near circular orbit of about 585 km above the Earth's surface. find the magnitude of the centripetal acceleration of the satellite
A child has a temperature of 101F. If her total skin area is 18 m2, find the energy loss per second due to radiation, assuming the emissivity is 1. Assume the room temperature is 70F. The Stephan-Boltzmann constant is 5.6696 ×10^8 W/m2*K4.
question1a 25mw jet engine produces a sound level of 120db threshold of pain at a distance of 100m from the engine
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