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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?
question1to measure static friction coefficient between a 4.34 kg block and a vertical wall the setup shown in drawing
A 3.00*10^2-eV electron and a 1.00*10^2-eV electron trapped in a uniform magnetic field move in circular paths in a plane perpendicular to the magnetic field. What is the ratio of the radii of their orbits?
a small ball is thrown with a speed of 15 m/s downward from the top of a 50 meter tall building. determine the ball's velocity at the midpoint of its motion
An elevator car of mass 780 kg falls from rest 3.10 m, hits a buffer spring, and then travels an additional 0.390 m, What is the force constant of the spring
In a student experiment, a constant-volume gas thermometer is calibrated in dry ice (?78.5°C) and in boiling pentane (36.1°C). What pressure would be found at the boiling point of water
In a constant-volume process, 205 J of energy is transferred by heat to 0.94 mol of an ideal monatomic gas initially at 309 K. find the increase in internal energy of the gas
A 600 turn solenoid is 15cm long. the current in it is 35A. a3.0cm long straight wire cuts through the center of the solenoid,along the diameter. the wires carries a 23A current downward. What is the magnitude of the force on this wire assuming the s..
A radio receiver can detect signals with electric field amplitudes as small as 210?V/m. What is the intensity of the smallest detectable signal
A 0.2 m^3 rigid tank initially contains refrigerant 134a at 1 MPa, saturated vapor. The tank is connected to a supply line that contains refrigerant 134a at 1.2 MPa, 30 degrees C. Refrigerant is allowed to enter the tank until the tank contains sa..
A pyrex beaker that holds 250 ml of water at 20 degrees celcius is filled to the brim. how much water (if any) will spill out of the beaker
80 cm3 of water takes 12 min to cool from 40?C to 15?C in a draft; it is contained in a copper calorimeter of mass 150 g, Calculate the specific heat of the suspension in SI units
A 100-g aluminum calorimeter contains 250-g of water. Twosubstances are in thermal equilibrium at 10 degrees celcius. Determine the specific heat of the unknown sample
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