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The resistance of a silver wire is to be calibrated for low-temperature measurements. A silver wire with a resistance of 1.15 ? at 20.0 °C is immersed in liquid nitrogen at 77.0 K (-196 °C). If the temperature response of the silver wire is linear, what is the expected resistance of the silver wire at -196 °C? (?silver = 3.80×10-3/°C)
From what height did the student fall? Suppose that the only force acting on him all through the impact is that because of the ground.
A 10-g bullet is fired horizontally into a 300-g wooden block initially at rest on a horizontal service and becomes embedded in it. The coefficient of friction between block and surface is 0.50. The combined system slides 4.0-m before stopping. Wi..
After the interaction, the particles (which can't be distinguished) are observed moving at angles 55.3° and 34.7°, both angles being measured with respect to the original direction of motion. Illustrate what are the final speeds of the particles?..
The distance to the Andromeda Galaxy is estimated at about 2 x 10(6) light years. A light year is distance traveled by light in one year; if the speed of light is 3 x 10(8) m/s, about how far is it from our galaxy to Andromeda? (1 year =3.15 x 10(..
A stretched rubber band has the length of 0.04 m and a fundamental frequency of 462 Hz. What is the speed at which waves travel on the rubber band.
A shopper pushes a cart 39 m south down one aisle and then turns 90.0° west and moves 22 m. He then makes another 90.0° turn and moves 14 m.
Lillian (mass 32.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 2.0 m/s. Evaluate what is the speed of Lillian and her dog after the catch?
On a cool morning, when the temperature is 11 ^circC, you measure the pressure in your car tires to be 30.0 psi. After driving 20 mi on the freeway, the temperature of your tires is 53 ^circC.
At a distance of 4.32m from a siren, the sound intensity is 3.75 x 10-2 W/m2. Assume that the siren radiates sound uniformly in all directions; find out the total power radiated.
Four charges Aq,Bq,Cq, and Dq (q = 5 x 10-07C) sit in a plane at the corners of a square whose sides have length d = 80.0 cm. A charge, Eq, is placed at the origin at the center of the square.
It again strikes the floor. Find (c) the time interval from when the ball was launched to when the ball strikes the floor and (d) the horizontal distance from the point where the ball was launched to the point where the ball strikes the floor.
What is the minimum time necessary for crossing.
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