The average mass of rain drops is 3.0 × 10-5 kg and their average terminal velocity is 9 m/s. 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.

Question

The average mass of rain drops is 3.0 × 10-5 kg and their average terminal velocity is 9 m/s. 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. (A) 3.5 × 105 J (B) 4.05 × 104 J (C) 3.0 × 105 J (D) 9.0 × 104 J

Tardigrade Admin · Accepted Answer

E = (1/2) (1 × 0 × 104) × 81 = 500× 81 = 40500 J = 4.05× 104 J

Q. The average mass of rain drops is $3.0 \times 1 0^{- 5}$ kg and their average terminal velocity is $9 m / s .$ Calculate the energy transferred by rain to each square metre of the surface at a place which receives $100 c m$ of rain in a year.

$3.5 \times 1 0^{5} J$

$4.05 \times 1 0^{4} J$

$3.0 \times 1 0^{5} J$

$9.0 \times 1 0^{4} J$

$E = \frac{1}{2} (1 \times 0 \times 1 0^{4}) \times 81$
$= 500 \times 81$
$= 40500 J$
$= 4.05 \times 1 0^{4} J$

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

3.5×105J

4.05×104J

3.0×105J

9.0×104J