Suppose the average mass of raindrops is 3.0 × 10-5kg and their avera

1.	Suppose the average mass of raindrops is 3.0 × 10-5kg and their average terminal velocity 9 m s-1. Calculate the energy transferred by rain to each square metre of the surface at a place which receives 100 cm of rain in a year.
Answer» m = 3.0 × 10^–5 kg r = 10^–3 kg/m² v = 9 m/s A = 1m² h = 100 cm ⇒ n = 1m³ M = ρv = 10^–3 kg, E = (1/2)Mv² = (1/2) x 10³ x (9)² = 4.05 x 10⁴J.

Suppose the average mass of raindrops is 3.0 × 10-5kg and their average terminal velocity 9 m s-1. Calculate the energy transferred by rain to each square metre of the surface at a place which receives 100 cm of rain in a year.

Answer»

m = 3.0 × 10^–5 kg r = 10^–3 kg/m² v = 9 m/s

A = 1m² h = 100 cm ⇒ n = 1m³

M = ρv = 10^–3 kg, E = (1/2)Mv² = (1/2) x 10³ x (9)² = 4.05 x 10⁴J.