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) only that part of the moon which reflects light
(B) Our distance from the moon keeps changing

(C) The thickness of the moon's atmosphere
(D) The shadow of the Earth covers only a part of moon

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The planet nearest to the sun is:...?

(A) Jupiter
(B) Saturn

(C) Mercury
(D) Earth

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To make an uncharged object to have a negative charge we must...?

(A) Remove some portion
(B) Add some atoms

(C) Add some electrons
(D) None of these

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Coldest planet of the solar system is...?

(A) Saturn
(B) Uranus

(C) Earth
(D) Venus

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Earth completes one rotation on its axis in...?

(A) 23 hours and 30 minutes
(B) 23 hours 56 minutes and 4.9 seconds

(C) 24 hours
(D) 24 hours 1 minute and 10 seconds

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Which type of mirror is used in the head lights of vehicles...?

(A) Concave
(B) Convex

(C) Plain
(D) None of these

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H=100-4t The equation above can be used to model the number of hours h until a gallon of milk held at a temperature of t, in degrees Celsius, goes sour. Based on the model, which of the following is the best interpretation of the number 4 in the equation...?

(A) An increase of 1 degree Celsius will make a gallon of milk go sour 4 hours faster
(B) An increase of 1 degree Celsius will make 4 gallons of milk go sour 1 hour faster

(C) An increase of 4 degrees Celsius will make a gallon of milk go sour 1 hour faster
(D) An increase of 4 degrees Celsius will make a gallon of milk go sour 4 hours faster

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A pinhole camera consists of ____ lens:...?

(A) 0
(B) 1

(C) 2
(D) 3

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Surena an invention of the university of Tehran is...?

(A) Bomb
(B) Missile

(C) Robot
(D) None of these

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