How much electricity can a turbine generate in one year?

Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 50 meters and a wind-conversion efficiency of 25 percent. The turbine operates in an area with an average wind-power density of 500 watts/sq meter at 50 meters altitude. How much electricity (kwH) can the turbine generate per year? Wind densities greater than or equal to 500 watts/sq meter at an altitude of 50 meters are present on 1.300 percent of the land area of the US. If, on average, wind farms contain 8 turbines/sq km, how much electricity (kwH/yr) could be generated from these wind turbines? (The area of the US is 7,827,989 sq km).

Average steady state concentration of 222Rn in a house

Radioactive radon gas (222Rn) enters an average building at a rate of 4.5 picocuries per second per square meter of foundation area. Consider a house with a foundation of 500 square meters and a volume of 1000 cubic meters. Assume the house if well designed for energy conservation so that the ventilation rate is low and only one tenth of the air in the house is exchanged with outdoor air every hour. What will be the average steady state concentration of 222Rn (in Ci/cubic meter) in the house?

amount of dissolved oxygen in groundwater sample

A ground water sample , at 25 C, has Eh= 0.2 and pH=5.40. Assuming the system is at equilibrium, calculate the amount of dissolved oxygen (ppm) in the groundwater sample. [O2-aq]/[O2-g]=0.0012589

Finding partial pressure in atm with given pH and iron concentrations

What is the calculated value of the partial pressure(atm) of O2 in acid mine water of pH 2.200, in which [Fe3+] = [Fe2+]?

Electricity: Power Generation by Wind Turbine.

Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 65 meters and a wind-conversion efficiency of 25 percent. The turbine operates in an area with an average wind-power density of 300 watts/sq meter at 50 meters altitude. How much electricity (kwH) can the turbine generate per year?Wind densities greater than or equal to 500 watts/sq meter at an altitude of 50 meters are present on 0.700 percent of the land area of the US. If, on average, wind farms contain 8 turbines/sq km, how much electricity (kwH/yr) could be generated from these wind turbines? (The area of the US is 7,827, 989 sq km). Thanks