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Physics

Physics
Lens is made up of which glass

Cobalt glass
Flint glass
Ordinary glass
Pyrex glass

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Physics
Which resource is both renewable and inexpensive?

Coal
Sunlight
Minerals
Gold

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Physics
The apparent weight of a man in a lift is less the real weight when :

The lift is going up with an acceleration
The lift is going down with uniform speed
The lift is going down with an acceleration
The lift is going up with uniform speed

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Physics
The frequency of ultrasound wave is typically

Above 20 kHz
Below 02 kHz
Above 20,000 kHz
Below 20 kHz

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Physics
If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to ________.

30 m
3 m
0.3 m
300 m

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Physics
Lightning is caused due to

Electric pressure
Electric discharge
Electric power
Electric leak

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