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Physics

Physics
Anemometer is an instrument meant for measuring ________

Wind speed
Air masses
Temperature
Velocity

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Physics
The wavelength of a wave is the distance between

Crest and Crest
Crest and Trough
Trough and Trough
Both B & C

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Physics
In which of the following cases, kinetic energy is being used in performing work ?

Driving a car to cover a distance
Wind mill grinding wheat grain
Paddling the bicycle to cover a distance
Rowing a boat in the lake

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Physics
A pilot has to release the bomb to hit a target

Before the target
None of these
Right above the target
Beyond the target

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Physics
In radio-communication, the signals emitted by transmitting antenna are reflected on

Ionosphere
Troposphere
Stratosphere
Ozonosphere

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Physics
The force of friction between two surfaces will increase if:

Irregularities on both the surfaces are removed
Air gap is created between the two surfaces
A layer of lubricant is kept between the two surfaces
The two surfaces are pressed harder

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