Turnover time for the humidity in the atmosphere is equal to? A- Evapotranspiration rate/volume of atmosphere. B- volume of atmosphere/ Evapotranspiration rate. C- Evaporation rate. D- volume of atmosphere. What is the correct answer??

Estimate the vapor pressure, air pressure, relative humidity, and air density at a height of 1800 m into the atmosphere. The total pressure is 101 kPa, air temperature is 25°C and the dew point temperature is 15°C near the ground, the lapse rate 7.5°C/km, which is constant for both air temperature and dew point temperature. The gas constant R is 287 J/kg-K and constant with respect to altitude. Vapor Pressure at 1500m, in Pa Round to the nearest whole number Add your answer

Residential annual energy use. For a house with: Air exchange rate of 0.5 h−1 Cp = 1000 J/kg.K Density of air = 1.2 kg/m3 Roof area = 144 m2; opaque wall area = 96 m2; window area = 24 m2; volume = 360 m3 Conductivity of Uwall = 0.60 W/(m2-K); Uwin = 3.0 W/(m2-K); Uroof = 0.40 W/(m2-K) Heating system efficiency of 0.85 Heating degree days (HDD) of 3500 K-days Calculate the Ktot for this house. Calculate the annual energy used to heat this house (in GJ).