How much solar energy is received by `5 m^2` in `2` hour ? Given solar constant ` = 1.4 kW//m^2`.

Explanation

Solar energy received = solar constant xx area xx time
=`(1.4 kWm^2)(5 m^2)(2 xx 60 xx 60 s) (2 h = 2 xx 60 xx 60 s)`
=`50400 kJ (1W = 1 J//s)`.