Find the power of a person who can chew 30g of ice in one minute. Latent heat of ice =80cal//gm , J=4.2 joule // cal.

What is the power of an engine which can lift 600 kg of water per minute from 20 m deep well?

Calculate the horse power of a man who can chew ice at the rate of 60g min.^(-1) . Given J = 4.2 J cal^(-1) and altent heat of ice = 80 cal g^(-1), 1hp = 746W .

The height of the Niagara Falls is 50m .Calculate the difference between the temperature of water at the top and the botom of the falls. (Specific heat capcity of water =1000 calories per kg and J=4.2 joules per calorie).

What is the power of a body which is doing work at the rate of one joule per second?

What is the power transferred per unit volume into joule heat in a resistor ?

A meteorite of mass 10^(4)kg enters into atmosphere with a velocity of 10^(3) ms^(-1) . How many calories of theat is produced when it is stopped due to frictioin with atmospheric ariL? (J=4.2 joules per calorie)

From what height must a block of ice fall to just melt by the impact assuming that half of the heat generated is absorbed by ice? ( J=4.2 joules per calories and L=80 kilocalories per kg)

A 660-W electric lheater is hdesigned to operate from 129V lines. What is the resistance? What current does it draw? What is the rate of production of heat in calories per second? If the line voltage drops to 110V. What is power does the heater takes in waits? (J=4.2 joules per calorie).