Question

If the solar constant is 1.4 kW/m² then solar energy recived by 1m²area in one hour is:

(a) 5040 J
(b) 504.0 kJ
(c) 5040 kJ
(d) 5.04 kJ

Answer 1

 5040 kJ

Solar constant = 1.4 kW/m²   
          1 hour = 60 × 60 sec = 3600 sec
Therefore, energy = 1.4 kJ/s/m² × 3600 s = 5040 kJ