Chapter 9, Problem 17P

On a summer day, the mean solar irradiance received at a lake was 500 W/m^ 2 over 25 days (consider the day length to be 8 hours). If 80% of the energy is used to vaporize water, how large could the depth of evaporation be?

One geoengineering solution to prevent global warming is to increase Earth’s albedo by adding particles to the stratosphere that can reflect sunlight or increasing cloudiness over the oceans. By how much does the albedo have to change to reduce the Earth’s temperature by 1 degree K? What is the corresponding energy difference in W/m2? Assume a one layer atmosphere modelthat is transparent to visible light and opaque to surface emitted IR, a solar constant of 1360W/m2 and an initial albedo of 0.30.

22   A power plant has efficiency of 30 % as compared to Fuel Cell power plants. This power plant can be .......................................... a. Geothermal Power Plant b. Wind Power Plant c. Thermal Power Plants d. Biomass Power Plant