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An engine has a hot reservoir temperature of 935 K and a cold reservoir temperature of 616 K. The engine operates at three-fifths maximum efficiency. What is the efficiency of the engine?
With its wheels locked, a van slides down a hill inclined at 36.0 to the horizontal. Find the acceleration of this van if the hill is icy and frictionless.
The terminal voltage of a certain battery is measured with the battery disconnected and is found to be 6.36 V. The internal resistance of the battery is 1.05 ?. Find the voltage across the battery terminals when there is a current of 1.92 A from the ..
a portable classroom is heated with small propane heating units with a capacity of 3 kw each. the portable classroom is
Three identical conducting spheres initially have following charges: sphere A, 5Q; sphere B, -7Q; and sphere C, 0. Spheres A and B is fixed in place, with a center-to-center separation that is much larger than the spheres.
a cylindrical steel pressure vessel with volume 1.32m3 is to be tested. the vessel is entirely filled with water then a
Two lightbulbs have cylindrical filaments much greater in length than in diameter. The evacuated bulbs are identical except that one operates at a filament temperature of 2 195°C and the other operates at 2 085°C. Find the ratio of the power emitt..
Passengers on The Tower of Doom, a free-fall ride at Six Flags America, sit in cars that are raised to the top of a tower. How high is the tower
A ship is lost in a dense fog in a Norwegian fjord that is 2.56 km wide. The air temperature is 5.00°C. How far from one side of the fjord is the ship
A person can be killed if a current as small as 50 mA passes near the heart. An electrician is working on a humid day with hands damp from perspiration. What potential difference between the two wires
two long parallel wires are separated by 3.37 cm and carry currents 1.25 a and 3.43 a. find the magnitude of the
A uniformly accelerated car passes three equally spaced traffic signs. The signs are separated by a distance d = 20 m. What is the magnitude of the acceleration of the car
A single circular loop of radius 0.23m carries a current of 2.7A in a magnetic field of 0.96T. What is the maximum torque exerted on this loop
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