Question

14. A boy blowing a whistle sends in air at 2 gm/sec with a speed of 150 m/s.
His lung power is
1) 2.25 W 2) 22.5 W 3) 225 W
4) 0.225 W​

Answer 1

Answer:

0.225

Explanation:

Answer 2

Answer: 22.5 kW

Explanation:

P=1/2 dm/dt v^2

=1/2 x 2 x 10^-3 x (150)^2

= 10^-3 x 22500

= 22.5 kW