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A lead wire of cross-sectional area 0.980 mm2 is at a temperature of 2.00 K and carries a current of 0.490 A. (a) Find the voltage drop along a 10.4 m length of the wire.
An engine does 17200 J of work and rejects 6470 J of heat into a cold reservoir whose temperature is 272 K
In the electron gun pictured, a potential differenceof 10.9 kV is found to bringelectrons from rest at the cathode to 6.2 x 107 m/sat the anode. If the electrons reach the anode with a speedof 2.9 x 107 m/s,what is the potential difference between th..
a vertical spring is 10.0 cm long when supporting a 20.0 kg mass and it is 12.0 cm long when supporting a 32.0 kg mass.
A particular heat engine has a mechanical power output of4.80kW and an efficiency of26.0%. The engine expels8.90103J of exhaust energy in each cycle. Find the energy taken in during each cycle.
Two particles are created in a high-energy accelerator and move off in opposite directions. What is the speed of the second particle, as measured in the laboratory
A 645N woman climbs a staircase that rises at 50 degrees above the horizontal and is 4.95m long. Her speed is a constant 40.0cm/s. How much work has gravity done on her as she climbed the stairs
A young woman buys a sports car that can accelerate at the rate of 5.47m/s2. She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.47s before Kathy. Stan ..
A small, 1.70-mm-diameter circular loop with R = 1.30×10?2? is at the center of a large 100-mm-diameter circular loop. Both loops lie in the same plane
4.10g of nitrogen gas at 20.0 C and an initial pressure of 2.70 atm undergo an isobaric expansion until the volume has tripled. The gas pressure is then decreased at constant volume until the original temperature is reached. What is the gas pressur..
A cheetah is traveling across the African countryside, initially moving at a constant velocity of 15 m/s. What is the average acceleration of the cheetah from t = 0 to t = 4.0 seconds
An oxygen molecule has a vibrational mode that behaves approximately like a simple harmonic oscillator with frequency 2.99 X 10^14 rad/s. Calculate the energy of the ground state
A bus is traveling up a hill at a speed of 34m/s. The hill is 23 degrees relative to horizontal and the coefficient of static friction between the bus's tires and the road is 0.6. What is the car's minimum breaking distance?
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