If the solar energy received in `5` minutes by `10 m^2` area is`4200 kJ`, find the value of solar constant.

Explanation

Solar energy = `("solar energy received")/("area xx time") = (4200 kJ)/((10 m^2)(5 xx 60 s)) = 1.4 (kJ)/(m^2) s`
=`1.4 kW//m^2 (1 W = 1 J//s)`.