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Make a drawing of a metal rod that has length 12cm and a total mass of 70g including two metal loops at both ends, which go around two metal poles. The rod is in good electrical contact with the poles but can slide freely up and down. The metal poles are connected by wires to a battery, and a 5A current flows through the rod. A magnet supplies a large uniform magnetic field B in the region of the rod, large enough that you can neglect the magnetic fields due to the 5A current. The magnetic field is oriented so as to have the maximum effect on the rod. The rod sits at rest 4cm above the table. What is the magnitude of the magnetic field in the region of the rod?
You set up an experiment with two polarizer screens on an optical bench and collect data for the intensity of the light at the detector as you vary the relative angle between the transmission axes of the polarizers. What is intensity of the light s..
The Fermi energy of silver at 300 K is 5.48 eV. What is the average energy of a conduction electron in silver at 300 K
A gas is enclosed in a container fitted with a piston of cross-sectional area 0.150 m2. If the internal energy of the gas decreases by 6.40 J, find the amount of heat removed from the system by heat during the compression
you camera lens has alens of 35mm focal length and film that is 36mm wide. how far are you from the airplane
A baseball player hits a double and ends up on second base. A baseball "diamond" is a square, each side of length 27.4 m, What is the magnitude of the player's displacement
At its Ames Research Center, NASA uses its large "20-G" centrifuge to test the effects of very large accelerations ("hyper gravity") on test pilots and astronauts. In this device, an arm 8.84 {rm m} long rotates about one end in a horizontal plane..
A boat has a mass of 6800 kg. Its engines generate a drive force of 4000 N, find the magnitude and direction of the boat's acceleration
a 0.22 kg block of cheese lies on the floor of a 870 kg elevator cab that is being pulled upward by a cable through distance d = 2.3 m. how much work is done on the cab by the force from the cable
A 0.400 kg soccer ball approaches a player horizontally with a speed of 11.0 m/s. What impulse was delivered to the ball by the player
A heat engine absorbs 21000 J from a hot reservoir at 257 degrees C and expels 15000 J to a cold reservoir at 37 degrees C in each cycle. Find the theoretical efficiency and the actual efficiency
question1prairie dogs live in underground burrows with at least two entrances. one entrance is higher above ground and
A telephoto lens with focal length of 120mm has f-numbers ranging from f/2.8 to f/22, What is the diameter of the lens aperture at f/2.8? in millimeters
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