Question: At midday, solar energy strikes the earth with an intensity of about 1 kW/m2. What is the area of a solar collector that could collect 150 MJ of energy in 1 h? This is roughly the energy content of 1 gallon of gasoline.
a. Estimate the height in meters of the two flights of stairs that go from the first to the third floor of a building.
b. Estimate how long it takes you to run up these two flights of stairs.
c. Estimate your power output in both watts and horsepower while running up the stairs.