Refraction of sound can occur in:...? Mcqs

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Refraction of sound can occur in:...?

(A) Water
(B) Air

(C) Both A & B
(D) None of these

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If a metal block applies a force of 20 N on an area of 5 cm2. Find the pressure being applied by the block on the area of _____ ...?

(A) 100 Ncm^-2
(B) 0.8 Ncm^-2

(C) 0.25 Ncm^-2
(D) 4 Ncm^-2

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The altitude on stratosphere is ______...?

(A) 40 to 45 km
(B) 50 to 55 km

(C) 60 to 65 km
(D) 70 to 75 km

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Which of the following is an example of a solution...?

(A) Sand and water
(B) Oil and water

(C) Sugar and water
(D) Salt and air

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What is the warmest Ocean...?

(A) Pacific Ocean
(B) Atlantic Ocean

(C) Arctic Ocean
(D) Indian Ocean

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The weakest of all fundamental forces is the ________________...?

(A) Gravitational force
(B) Electrostatic force

(C) Magnetic force
(D) Nuclear force

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When a star becomes a singularity and has zero volume and infinite density, it is called_______________...?

(A) White dwarf
(B) Blue giant

(C) Wolf-Raynet star
(D) Black hole

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Where do the Prime Meridian and the equator intersect each other point...?

(A) Arabian Peninsula
(B) Malacca Strait

(C) Gulf of Guinea
(D) All of These

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If zero line of Vernier scale coincides with zero of main scale, then zero error is ______...?

(A) Positive
(B) Zero

(C) Negative
(D) One

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The ISS (International Space Station) orbits Earth about once every...?

(A) 60 minutes at an altitude of about 400 km
(B) 60 minutes at an altitude of about 500 km

(C) 90 minutes at an altitude of about 400 km
(D) 90 minutes at an altitude of about 500 km

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