Physics
Solar eclipse will take place when

the earth is between the moon and the sun
the moon is between the sun and the earth
the moon does not lie on the line joining the sun and the earth
the sun is between the moon and the earth

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Physics
Super conductors are substances that

Offer high resistance to the flow of electric current
Conduct electricity at low temperature
Conduct electricity at high temperature
Offer minimum resistance to flow of electric current

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Physics
The bats can fly in the dark because

They generate ultrasonic sound waves
They generate flashes of light
They can see the objects in darkness
They have weak legs and are likely to be attacked by predators

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