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A U-tube contains liquid of unknown density. An oil of density 762 kg/m3 is poured into one arm of the tube until the oil column is 10 centimeter high. The oil-air interface is then 5 centimeter above the liquid level in the other arm of the U-tube. Evaluate what the density of the liquid.
A wire loop of radius 0.1 m has a 2-ohm resistance. A uniform magnetic field perpendicular to the plane of the loop increases from zero to 2 T in 0.01 s
A doubly charged ion is accelerated to an energy of 30.0 keV by the electric field between two parallel conducting plates separated by 1.50 cm
Two spherical objects have a combined mass of 200. The gravitational attraction between them is 8.01×10-6 while their centers are 21.0 apart.
A 9.6 g bullet is fired into a stationary block of wood (m= 5.05 kg). The bullet imbeds into the block. The speed of the bullet-plus-wood combination immediately after the collision is 0.591 m/s. What was the original speed of the bullet?
What is an approximate absorbed dose rate in Gy per day in water at the center of the bucket if 163 atoms of Cs-137 disintegrate per g s? Use the straight-ahead approximation and mean-radius method of calculating the photon dose. Give the answers for..
The wavelength of light visible to the human eye is on the order of 6 × 10-7 m. Find the frequency of the lightwave if the speed of light in air is 2.99792 × 108 m/s
A solid aluminium cube 20 cm on an edge floats face-down onmercury. How much higher on the cube's sides will the mercury level be
Assuming that the Earth is spherical and recalling that latitudes range from 0 degrees at the Equator and 90 degrees N at the North Pole, at what angle below the horizantol would the tunnel be directed
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. Find the time it takes for the ball to fall from rest all the way to the ground
A weather vane initially at rest has a moment of inertia of 0.116 kg · m2 about its axis of rotation. Find the angular velocity of the weather vane just after it is struck
Consider an isolated hydrogen atom of mass 1.66x10^(-27) kg.Let an upwardly directed laser beam emitting 1 eV photons be focused in such a way that the full momentum of each of its photons is transferred to the atom. Find the average upward force ..
Light of wavelength 5.0*10^-7 m in air is incident normally (perpendicular) on a doubled slit. The distance between the slit is 4.0*10^-4 m, Caculate the line density in slits/mm of the diffraction grating
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