Which from the following is true for "Sound"...? Mcqs

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Which from the following is true for "Sound"...?

(A) Sound cannot travel through a vacuum
(B) Sound cannot travel through gases

(C) Sound cannot travel through liquids
(D) Sound cannot travel through solids

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The velocity of sound in air at sea level is...?

(A) 881 meters per second
(B) 761 meters per second

(C) 661 meters per second
(D) 561 meters per second

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Air is a mixture of _______...?

(A) Solid
(B) Liquid

(C) Gas
(D) None of these

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When the object moves with the speed of light its mass would be...?

(A) equal to its rest mass
(B) double of its rest mass

(C) infinite
(D) Zero Zero

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Phases of the moon occur because:...?

(A) we can see only that part of the moon which reflects sunlight light towards us
(B) our distance from the moon keeps changing

(C) the shadow of the Earth covers only a part of the moon’s surface
(D) None of these

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Nobel Prize in Physics was awarded to Dr.Abdul Salam in the year...?

(A) 1969
(B) 1978

(C) 1966
(D) 1979

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Why is the Ozone important for mankind...?

(A) Protection from ultraviolet rays of sun
(B) It releases oxygen in the air

(C) It maintains temperature of the earth
(D) It releases hydrogen in the atmosphere

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The boiling point of water depends upon the:...?

(A) Atmospheric pressure
(B) Mass

(C) Density
(D) Volume

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The science of celestial bodies is known as...?

(A) Agronomy
(B) Coprology

(C) Astrology
(D) Astronomy

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Sound travels fastest in:...?

(A) Solid
(B) Liquid

(C) Gas
(D) None of these

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