Physics
Superconductors are substances which

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

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Physics
Rain drops fall from great height. Which among the following statements is true regarding it?

Their velocity increases and they fall with different velocity on the earth
They fall with same ultimate velocity
Their velocity increases and they fall with same velocity on the earth
They fall with that ultimate velocity, which are different for different droplets

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