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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 movie camera with a (single) lens of focallength 75 mm takes a picture ofa person standing 34 m away. what is the height of the image of the person on the film
A person stands in a stationary canoe and throws a 5.20 kg stone with a velocity of 7.85 m/s at an angle of 35.0 degrees above the horizontal. The person and the canoe have a combined mass of 105kg.
You slide a box of books at constant speed up a 30 degree ramp, applying a force of 170N directed up the slope. What is the mass of the box
A light bulb is connected to a 120 V wall socket. The current in the bulb depends on the time t according to the relation I = (1.414 A) sin[ (125.6 Hz) t ]. What is the average power delivered to the light bulb
a firefighter with a weight of 715 n slides down a vertical pole with an acceleration of 3.10 ms2 directed downward.a
A circular saw blade rotating at 15 rev/sec is brought to a stop in 125 revolutions. what is the size of the angular acceleration experienced
a charge of 21 nc is uniformly distributed along a straight rod of length 4.3 m that is bent into a circular arc with a
A current of 10.0 mA is maintained in a single circular loop with a circumferenceof 1.20 m. A magnetic field of 0.880 T is directed parallel to the plane of the loop. What is the magnitude of the torque exerted by the magnetic field on the loop?
A 160 pound pilot of an airplane executes a constant speedloop-the-loop maneuver in a vertical plane. what is his apparent weight at the highest point
A 2500 kg car rounds a flat curve of radius 75 m at speed of 80 km/h. if the pavement is icy and the force of static friction is 6000 n, what is the maximum speed the car could safely go around the curve
A container of volume 0.40m3 contains 3.3 mol ofargon gas at 28°C. Assuming argonbehaves as an ideal gas, find the total internal energy of the gas
A silver bar of length 30 cm and cross sectional area 4.0 cm2 is used to transfer heat from a 100°C reservoir to a 0°C block of ice. How much ice is melted per second?
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