Answer:
1.475×10²⁴ W
Explanation:
I = Solar constant of the sun = 1362 W/m² (measured using satellites with value 1.3608 ± 0.0005 kW/m² the error is due to fact that solar output is not always constant)
r = Radius of earth = 6371 km = 6371000 m (mean radius)
A = Area of earth = (4/3)×π×r³
=(4/3)×π×6371000³ = 1.083×10²¹ m²
P = I×A
⇒P = 1362×1.083×10²¹
⇒P = 1.475×10²⁴ W
∴ Rate at which the whole Earth receives energy from the Sun is 1.475×10²⁴ W
