A man with a mass of `80 kg` falls `10 m`. How much mechanical energy does he gain or lose ?

An electron moves from the positive to the negative terminal of a battery (9 V). How much potential energy did it gain or lose ?

An electron moves from the positive to the negative terminal of a battery (9 V). How much potential energy did it gain or lose ?

A boy weighing 50 kg climbs up a vertical height of 100 m. Calculate the amount of work done by him. How much potential energy does he gain ? ( g = 9.8 m//s^(2) ).

A trader marks 10% higher than the cost price. He gives a discount of 10% on the marked price. In this kind of sales how much percent does the trader gain or lose ?

By selling a stool for Rs 67.50, a carpenter loses 10%. How much percent would he gain or lose by selling it for Rs 82.50?

By selling a stool for Rs 67.50, a carpenter loses 10%. How much percent would he gain or lose by selling it for Rs 82.50?

By selling a stool for Rs 72 a carpenter faces a loss of 10%. How much percentage would he gain or lose by selling the stool for rs 96

Mr.Siddharth sold two bicycles at Rs 924 each.On one he gains 20% and on the other he loses 20%. How much does he gain or lose in the whole transaction?

A man sold two steel chairs for 500 each.On gains 20% and on the other,he loses 12% . How much does he gain or lose in the whole transaction.1.5% 1.5% loss d.2% loss