Question

3 A wind mill pumps 50kg of water every hour up to a height of 6 meter, if the efficiency of mill is 20%, find the power of wind. ​

Answer 1

Explanation:

Work = Force x distance

Force = mass x gravitational acceleration Force = 50x 10 = 500N

Work = 500 x 6 = 3000 Joules

Power Work done /Time =

Time = 1 × 60 x 60 = 3600s P = 3000/3600

P = 0.83333

This is power output.

Efficiency = power output /power input x 100%

0.83333/P x 100 = 20

83.333= 20P

P = 83.333/20

P = 4.16665 Joules per second

This is the power of the mill.

Answer 2

Answer:

At the Indian National Congress Karachi session in 1931, Congress passed resolution dissociating itself and disapproving the policy of political violence in any form. The resolution was drafted by Mahatma Gandhi which admired the bravery and sacrifice of the 3 Martyrs- Bhagat Singh, Sukhdev, and Rajguru.