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Physics

Physics
Speed of sound is the greatest in :

Air
Water
Glycerine
Glass

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Physics
When an atom loses an electron it becomes

Neutron
None of these
Negative ion
Positive ion

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Physics
What is the full form of "RADAR" ?

Region Device and Ranging
Radio Detecting and Ranging
Radio Detect and Rangs
Radio Device and Ranging

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Physics
When hot-water is sprinkled on a hotter glass tumbler, it breaks because

Glass suddenly expands
Glass suddenly contracts
Water evaporates
Glass reacts chemically with water

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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
Which of the following is a device designed to protect electrical devices from voltage spikes?

Current unloader
Voltage unloader
Heat protector
Surge protector

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