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Physics

Physics
Who among the following discovered X-rays?

Marie Curie
J.J Thomson
W.C Roentgen
James Chadwick

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Physics
Lens is made up of

Flint glass
Ordinary glass
Pyrex glass
Cobalt glass

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Physics
The sound produced by a bat is–

Ultrasonic
Infrasonic
Audible
Subsonic

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Physics
Surface tension in a liquid is due to :

Electrical force between molecules.
Adhesive force betweenmolecules
Gravitational force between molecules
Cohesive force between molecules

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Physics
Wind and solar energy are examples of

Unsustainable
Non renewable
Renewable
Limited

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Physics
Heavy water is used in nuclear reactor to

Absorb neutron
Increase temperature
Slow down neutron
Increase speed of neutron

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