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A power plant taps steam superheated with geothermal energy to 540 K (the temperature of the hot reservoir) and utilizes the steam to do work in turning the turbine of an electric generator. The steam is then converted back into water in a condenser at 326 K (the temperature of the cold reservoir), after which the water is pumped back down into the earth where it is heated again. The output power (work per unit time) of the plant is 75,500 kilowatts.
a) Decide the maximum efficiency at which this plant can operate.
b) Decide the minimum amount of rejected heat that should be removed from the condenser every twenty-four hours.
A racquetball with a diameter of 5.6 cm and a mass of 42 g is cut in half to make a boat for American pennies made after 1982. How many pennies can be placed in the racquetball boat without sinking it
A rotating wheel requires 3.03-s to rotate through 37.0 revolutions. Its angular speed at the end of the 3.03-s interval is 99.0 rad/s
Assume your eyes are located 16 cm below the top of your headand 172 cm above the bottom of your feet. You are standing 200cm in front of vertical wall. What is the length of the shortest mirror that can be hung on the wall to enable you tosee your..
A golf ball is hitwith an initial velocityof 60.0 m/s at an angle of 30 degress abovethe horizontal. How far does it travel
An ideal polarizer with its transmission axis rotated 30.5 to the vertical is placed in a beam of unpolarized light of intensity 10 W/m ^2. After passing through the polarizer, what is the intensity of the beam
Judy (mass 45.0 kg), standing on slippery ice, catches her leaping dog, Use the conservation of momentum to find the speed of Judy and her dog after the catch
Two children pull in opposite directions on a toy wagon of mass 9kg. One exerts a force of 18 N and the other exerts a force of 46 N
Two boats start together and race across a 56-km-wide lake and back. Boat A goes across at 52 km/h and returns at 56 km/h. Boat B goes across at 36 km/h, and its crew, realizing how far behind it is getting, returns at 79 km/h. Turnaround times are n..
53.3-cm-long uniformly charged rod is sealed in a container. the total electric flux leaving the container is
A toaster uses a Nicrhrome heating wire. When the toaster isturned on at 20o C, the initial current is 1.5A. A few seconds later, the toaster warms up and the current nowhas a value of 1.30A. The average temp coefficient ofresistivity for Nichrome is..
A garden has a circular path of radius 50 m. You start at the easternmost point on this path, What is the magnitude of your displacement
This is a conceptual question, The fundamental source of asound wave is a vibrating object, what is the fundamental source of an electromagnetic wave
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