Calculate efficiency of plant as ratio of electricity output
If a coal-burning electrical generating plant burns 2 tons of coal to generate 6000 kWh of electricity, calculate the efficiency of the plant as the ratio of electricity output to fuel energy input.
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Light is incident of the surface of metallic sodium, whose work function is 2.3 eV. The maximum speed of the photoelectrons emitted by the surface is 3.00 × 106 m/s. What is the wavelength of the light?
Refrigerant 134a enters a compressor with a mass flow rate of 5 kg/s and negligible velocity. The refrigerant enters the compressor as a saturated vapor at 10 deg C and leaves the compressor at 1400 kPa with an enthalpy of 281.39 kJ/kg and a veloc
If a strain of -0.087 is measured by a strain gage, what stress must the Aluminum be experiencing? If the bar is pourus nd you have a strain of 0.04 at a stress of 60,000psi , what is the effective modulus of the material?
The end of a robtoic arm extends along the path of the limacon r = (1+.5 cos [theta])m. at the instant that [theta] = pi/4, the arm has angular rotation [theta]' = .6 rad/s, which is increasing at [theta]'' = .25 rad/s^2.
The mass and volume of an American penny made after 1982 are 2.5 g and 0.36 cm3. How many pennies can be placed in the racquetball boat without sinking it? (The density of water is 1000 kg/m3.)
Air at 3x10-4 kg/s and 27o C enters a rectangular duct that is 1 m long and 4 mm by 16 mm on a side. A uniform heat flux of 600 W/m2 is imposed on the duct surface. What is the temperature of the air and the duct surface at the outlet?
Which of the following could not be the value of a correlation coefficient?
Determine the cycle efficiency of steam power plant working under the following data: Boiler pressure: 80 bar; condenser pressure: 0.1 bar, turbine inlet temperature: 5000C.
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