Physics
Air pressure is usually highest when the air is

Cool and dry
Cool and moist
Warm and moist
Warm and dry

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Physics
Dynamo is a device for converting

Heat energy into electrical energy
Chemical energy into electrical energy
Magnetic energy into electrical energy
Mechanical energy into electrical energy

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Physics
Scalar Quantities are

Physical quantities which have magnitude only and direction
Physical quantities which have no magnitude and no direction
Physical quantities which have no magnitude only and only direction
Physical quantities which have magnitude only and no direction

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