A certain rain cloud at an altitude of `2.0 km` contains `3.6 xx 10^(7) kg` of water vapour. How long would it take a `2.0 kW` pump to raise the same amount of water from the Earth's surface to the cloud's position?

A mixture of 20 kg. of spirit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25%?

The power of a water pump is 2 Kw . If g=10 m//s^2 . What is the amount of water it can raise in 1 minute to a height of 10 m?

How long would it take a radio wave of frequency 6xx10^(3) sec^(-1) to travel from mars to the earth, a distance of 8xx10^(7)km ?

How long would it take a radio wave of frequency 6xx10^(3) sec^(-1) to travel from mars to the earth, a distance of 8xx10^(7)km ?

How long would it take a radio wave of frequency 6xx10^(3) sec^(-1) to travel from mars to the earth, a distance of 8xx10^(7)km ?

How long would it take a radio wave of frequency 6xx10^(3) sec^(-1) to travel from mars to the earth, a distance of 8xx10^(7)km ?

A non conducting vessel thermally insulated from its surroundings, contains 100 g of water 0^(@)C . The vessel is connected to a vacuum pump to pump to water vapour. As a result of this, some water is frozen. If the removal of water vapour is continued, what is the maximum amount of water that can be frozen in this manner? Laten heat of vaporisation of water =22.5xx10^(5)Jkg^(-1) and latent heat of fusion of ice =3.36xx10^(5)Jkg^(-1)