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Physics

Physics
Minimum number of unequal vectors which can give zero resultant are

two
three
four
more than four

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Physics
What is the process of conversion of solid state directly to gaseous state called?

Evaporation
Sublimation
Condensation
Distillation

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Physics
Optic fibres are used in :

Ultrasound scans
X-ray photos
Endoscopy
CAT scans

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Physics
The quality or tone of a musical sound produced by a stringed instrument depends on

Length of the strings in the instrument
Amplitude of vibration
Frequency of vibration
Wave form of the sound

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Physics
Echo is heard due to

Reflection
Interference
Scattering
Refraction

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Physics
Total internal reflection can not take place when light goes from :

Water to air
Glass to water
Water to glass
Glass to air

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