Physics
A copper disc has a hole. If the disc is heated, the size of the hole

Increases
Decreases
First increases and than decreases
No change

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Physics
What is a neuron ?

Particle released during radioactivity
Basic unit of energy
Basic unit of nervous system
The anti-particle of neutron

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Physics
Absolute Zero is defined as

The temperature at which all molecular motion ceases
At which water boils at 298K
At which liquid Helium boils
At which the volume becomes zero

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