Assume a dry atmosphere in which the potential temperature is constant. at the surface, the temperature is 10°c and the pressure is 1013 hpa. what is the potential temperature? if an air parcel were raised adiabatically to 963 hpa what would the temperature be? use the hydrostatic relation to estimate the change in altitude.

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.