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An aircraft engine takes in an amount 9000 of heat and discards an amount 6400 each cycle.
a. What is the mechanical work output of the engine during one cycle?
b. What is the thermal efficiency of the engine?
A 1200 kg car is pulling a 500 kg triler along level ground. Friction is negligible. What is the magnitude of the force exerted by the car on the trailer
A woman stands on a scale in a moving elevator. Her mass is 69.5 kg, and the combined mass of the elevator and scale is an additional 815 kg. What does the scale read during the acceleration
what is the value of the R that gives zero pressure? write down it in terms of h, W and fundamental constants.
A kicker's extended leg is swung for 0.4 seconds in a counterclockwise direction while accelerating at 200 deg/s2. What is the angular velocity of the leg
q1. consider a too-small space station that consists of a 3.8 m radius rotating sphere. a man standing inside is 1.9 m
A ball hangs motionless from a ceiling by a string. How many forces are acting on the ball
a chartered airplane flies 100 km east, then 350 km north west, and then 150 km at 30 degrees west of south. determine the direction of the last leg of the journey
A lead bullet initially at 26.4oC melts just upon striking a target. calculate the speed of the bullet upon impact
She comes to rest 3.00 m under the surface of the water. Identify the magnitude of the average force that the water exerts on the diver. This force is nonconservative.
Light travels at a speed of 1.947 × 108 m/s in a certain substance. What is the index of refraction of this substance
A spherical balloon has a radius of 12.5 m, and is filled with helium. How large a cargo can it lift, assuming that the skin and structure of the balloon have a mass of 1200 kg? avoid the bouyant force on the cargo volume itself.
A pilot claims to have seen a UFO moving initially at the speed of about 440 m/s in an easterly direction and then, in a tie interval of only 1.0s turning 45 degrees and moving souutheast at 440 m/s
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