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A certain electric extension cord has a resistance of 3.28 Ω. Suppose it is replaced by an extensioncord made of the same material. The replacement cord isfive times the diameter of the originaland five times as long. What is the resistance of the new cord
a pulley having a rotational inertia of 1.0x104 gcm2 and a radius of 10 cm is acted upon by a force applied
Air is streaming horizontally past a small airplanes wings such that the speed is 50m/s over the top surface and 30 m/s past the bottom surface. the plane has a mass of 300 kg and a total wing area of 5 m^2(both wings).
a 1.5kg rock is released from rest at the surface of a calm lake. if the resistance offereed by the water as ther rock
A battery with an emf of 12.0 V shows a terminal voltage of 11.4V when operating in a circuit with two lightbulbs, What is the battery's internal resistance
Calculate the time it takes the sled to travel 21 m down the slope and draw a free-body diagram for the sled sliding down the slope.
A battery having an emf of 11.10 V delivers 102 mA when connected to a 61.0 load. Find out the internal resistance of the battery.
You have been playing baseball in the middle of the summer and you have 0.25 kg of Gatorade in an insulated container sitting on the dugout bench, what would be the final temperature of the gatorade
A proton in Fermilab's Tevatron is accelerated through a potential difference 2.06 MV during each revolution around the ring of radius 1.00 km. how many revolutions must the proton make
A converging lens with focal length of 11.8 cm is placed in contact with a diverging lens with a focal length of 21.1 cm. What is the focal length of the combination
An electric generator contains a coil of 90 turns of wire formed into a rectangular loop 40.0 cm by 35.0 cm, placed entirely in a uniform magnetic field with magnitude B = 3.50 T and with Bvec initially perpendicular to the coil's plane. What is the ..
A line in the x-ray spectrum of gold has a wavelength of 18.5 pm (=18.5 x 10^-7 m), What is the energy of the lower stationary state
A square loop of wire with 2.00m sides is perpendicular to a uniform magnetic field that points into the paper. what is the direction of the current through the resistor
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