## College Physics (4th Edition)

We can find the total amount of energy that is lost in one hour: $Q = P~t = (250~W/m^2)(0.005~m^2)(3600~s) = 4500~J$ We can find the amount of water that is lost after one hour: $Q = m~V$ $m = \frac{Q}{V}$ $m = \frac{4500~J}{2260~J/g}$ $m = 2.0~g$ 2.0 grams of water are lost through transpiration after one hour.