Physics
When a strong beam of light is passed through a colloidal solution, the light will

Be absorbed
Be reflected
Pass unchanged
Be scattered

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Physics
Superconductors are substances which

conduct electricity at high temperatures
offer no resistance to the flow of electricity
conduct electricity at low temperature
offer high resistance to the flow of current

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Physics
Planets do not twinkle because

Their distance from the earth does not change with time
They are very far away from the earth resulting in decrease in intensity of light
They emit light of a constant intensity
They are nearer to earth and hence we receive a greater amount of light.

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