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A power cycle operates between a lake's surface water at a temperature of 300l and water at a depth whose temperature is 285 K. at steady state the cycle develops a power output of 10KW, while rejecting energy by heat transfer to the lower temperature water at the rate 14,400 KJ/min. determine the thermal efficiency of the power cycle and the maximum thermal efficiency for any such power cycle.
An L-R-C series circuit is constructed using a 175? resistor, a 12.5?F capacitor, and an 8.00-mH inductor, find the potential difference across the ac source
High speed photography shows that when a golf club hits a golf ball, the club and the ball typically remain in contact for 1x 10?3 s, Estimate the magnitude of the force that the club exerts on the ball
A motorcycle starts with a constant acceleration of 3.0 m/s^2. At just that instant a buick with a constant speed of 20 m/s passes the motorcycle, How fast is the motorcycle travelling when it overtakes the buick
The car accelerates uniformly to a speed of 2.05 m/s in 13.0 s and then continues at constant velocity.
Responding to an alarm, an 88.4 kg fireman slides down a pole to the ground floor, 4.60 m below. What is the magnitude of the force exerted by the pole on the fireman
You've been given the task of designing a "water couch"-that one could lie on, floating on a lake, What minimum volume must the slab have so that a 45 kg teenager can lie on top of the slab without getting wet
A 2.08 nF capacitor with an initial charge of 4.55 µC is discharged through a 1.25 k? resistor. What is the maximum current in the resistor
A roller in a printing press turns through an angle given by , where =3.20 and =0.500. What is the maximum positive angular velocity
A 1200 kg boat is traveling at 80 km/h when its engine is shut off. The magnitude of the frictional force fk between boat, Find the time required for the boat to slow down to 40 km/h
q1. a uniform plank of length 4.6 m and weight 204 n rests parallel on two supports with 1.1 m of the plank hanging
You connect five identical resistors in series to a battery whose EMF is 12.0 V and whose internal resistance is negligible. What are the resistance of each resistor and the potential difference across each resistor
A series ac circuit consists of a voltage source of frequency f=60 Hz and source voltage amplitude 345 volts, a resistor of resistance R=335 ohms, what is the current amplitude in the circuit
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