Which way do twin screw props on a boat rotate when propelling the boat forward?

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a ball of mass 500g moving with a velocity of 10m/s collides with another ball of mass 250g.after the impact,the second ball moved off with a velocity of 8m/s calculate the final velocity of the first ball.

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Explain the Washing soda ?

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How d o the radio-waves pass through walls ?

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explain the proper definition of light?

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I have energy of (220V*1A=)220W. I want to convert it into (12V*15A=)180W. Is this possible? If yes, then how?

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Explain the applications of nmr spectroscopy?

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Joule - Thomson cooling is

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What is the physical significance of biot numbers?

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Define Fixation of Nitrogen?

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Explain how does the elevation and air pressure affect the boiling point of water?

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What is Fahrenheit thermometer ?

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