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Physics

Physics
A light year is a measure of :

Velocity
Time
Speed
Distance

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Physics
Which of the following is an example of continous emission spectrum?

Spectrum of an oil frame
None
Spectrum of a water
Both

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Physics
If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound?

0.084027777777778
0.052777777777778
0.16736111111111
0.044444444444444

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Physics
Friction is caused by the ________ on the two surfaces in contact.

Gaps
Irregularities
Smoothness
Densities

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Physics
Fibre optics work on the principle of

Total internal reflection
Scattering of light
Total internal absorption
Optical rotation

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Physics
The temperature which has the same reading on both Fahrenheit and Celsius scales is

0°
40°
32°
–40°

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