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A 1600 kW heat engineoperates at 21% efficiency. The heat energy expelled at thelow temperature is absorbed by a stream of water that enters thecooling coils at 20°C. If 72 L flows across the coils per second, determine the increase in temperature of the water.
The escape velocity of a bullet from the surface of planet Y is 1823 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.47 times that of Y,
A 260 wooden raft floats on a lake. When an 80 man stands on the raft, it sinks 5.0 deeper into the water. When he steps off, the raft vibrates for a while. What is the frequency of vibration.
A gas, while expanding under isobaric conditions, does 494 J of work. The pressure of the gas is 1.57E+5 Pa, What is the final volume of the gas
A 50.0-kg child on a 2.0 m long swing is released from rest when the swing supports make an angle of 30 degrees with the vertical. find the potential and kinetic energies of the child
A 50 gram ball enters a a pendulum with mass 200 g. The pair then swings up to a height of 14.5 cm. Find the initial velocity of the ball before the collision
A cube has sides of length = 0.320 . It is placed with one corner at the origin. The electric field is not uniform but is given by -4.95 2.17 .Find out the electric flux through each of the six cube faces.
lucite has index of refraction 1.49. the brewster's angle is56.1o. if unpolarized light is incident on the surfaceof a piece of lucite at this angle, describe the degree ofpolarization of the reflected light.
tsunamis are fast-moving waves often generated by underwater earthquakes. in the deep ocean their amplitude is barely
A spider of mass m is sitting in a perfectly symmetric web (in a vertical plane with 45 angles between the web lines), where Ti's denote the tensions along the lines that are connected to the spider at the center with i = 1, 2, 3, 4, 5, 6, 7, 8. The ..
A uniform cylindrical satellite has four tangential rockets. mass = 3600, radius = 4.0m, what is the required steady force of each rocket if the satellite is to reach 32 rpm in 5.0 min?
You are standing 4.5m from a convex security mirror in a store. You estimate the height of your image to be half of your actual height. Estimate the radius of curvature of the mirror
Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. A friend throws Olaf a ball of mass 0.400 that is traveling horizontally at 11.5 . Ola..
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