A rocket needs the speed of .......... to escape from earth's gravity...? Mcqs

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A rocket needs the speed of .......... to escape from earth's gravity...?

(A) 22 miles per second
(B) 15 miles per second

(C) 12 miles per second
(D) 7 miles per second

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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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In order to have a very wide field of view, the mirror used in cars is...?

(A) Convex
(B) Plane

(C) Concave
(D) Bi Concave

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Air is a mixture of _______...?

(A) Solid
(B) Liquid

(C) Gas
(D) None of these

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Who is credited for discovery of Planetry motion___...?

(A) Nicolaus Copernicus
(B) Darwan

(C) Kepler
(D) None

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Far Sightedness can be corrected by:...?

(A) Convex lens
(B) Concave lens

(C) Bi Focal lens
(D) None of these

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The SI unit of energy is:...?

(A) Watt
(B) Newton

(C) Joule
(D) None of these

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Sun's diameter is...?

(A) 3 million Km
(B) 2.5 million Km

(C) 1.4 million Km
(D) 1.8 million Km

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Fiber optics technology is being used in...?

(A) Telecommunication
(B) Electrical power control monitoring

(C) Oil and gas pipelines control and monitoring
(D) All Of Above

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

(A) Agronomy
(B) Coprology

(C) Astrology
(D) Astronomy

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