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Physics

Physics
Lakes freeze in cold countries in winter, leaving the water underneath at

4°C
0°C
4°F
0°F

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Physics
To measure the speed of an approaching car a police officer shines

Radio waves on it
Light waves on it
Microwaves on it
Ultra high frequency waves on it

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Physics
Boyle's law relates to

Plasticity of Solids
Viscosity of Liquids
Kinetic Theory of Gases
Elasticity of Solids

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Physics
X–rays are

Negatively charged particles
None of these
Neutral particles
Positively charged particles

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Physics
Which of the following statements is true when we see ''rainbow' ?

We face sun and raindrops
The Sun remains behind us and we face raindrops
The sky remains clear and the sun is at lower position in the sky
In light rainfall, we face Sun

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Physics
When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is

The violet ray
The blue ray
The red ray
The green ray

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