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Physics

Physics
A boat will submerge when it displaces water equal to its own:

Surface area
Weight
Density
Volume

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Physics
Solar energy is converted into chemical energy during

Photosynthesis
Diffusion
Osmosis
Transpiration

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Physics
The width of depletion layer of a P-N junction

Is increased under reverse bias
Decreases with light doping
Is independent of applied voltage
Increases with heavy doping

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Physics
The GPS device in an automobile uses which communication channel?

Satellite
Infrared
Radio frequency
Microwave

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Physics
The velocity required to place a vehicle in orbit around the moon is ________ that required to place it in orbit round the earth.

Greater than or equal to
Equal to
Less than
Greater than

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Physics
A circular plate, a cube and a sphere, all made up of same material and having the samemass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling?

Sphere
Cube
Circular plate
All will cool at the same rate

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