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Physics

Physics
In the atmosphere ultraviolet rays are absorbed by

Oxygen
Helium
Nitrogen
Ozone

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Physics
stars which appear single to the naked eye but are double when seen through a telescope are

quasars
novas and supernovas
asteroids
binaries

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Physics
The alluminating powers of two sources are compared by

A photometer
A fluxmeter
A polarimeter
A spectrometer

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Physics
At what temperature (in Fahrenheit) pure water freezes?

37
32
48

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Physics
Mud houses are cooler in summers and warmer in winters as compared to brick houses because

Mud is a good conductor
Mud is a poor insulator
Evaporation of water causes cooling in summers and sunlight coming through holes causes warming in winters
Mud is a bad conductor

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Physics
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?

Water, iron and air
Iron, water and air
Air, water and iron
Iron, air and water

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