Mach number is used in connection with the speed of___________...? Mcqs

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Mach number is used in connection with the speed of___________...?

(A) Ship
(B) Light

(C) Sound
(D) aircraft

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The audible range of normal human ear is ____...?

(A) 16 Hz to 20kHz
(B) 10 Hz to 31kHz

(C) 67 Hz to 45kHz
(D) 20 Hz to 20kHz

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The system is stable in equilibrium when ______...?

(A) Qc = Kc
(B) Qc > Kc

(C) Qc < K
(D) None of these

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The size of Covid-19 virus is______...?

(A) 25-30KB
(B) 28-30KB

(C) 29-30KB
(D) None of these

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In the human body, the lungs remove which gas from the blood...?

(A) Nitrogen
(B) Hydrogen

(C) Carbon Dioxide
(D) Argon

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Radio labeling and carbon dating also show some uses of radioactive isotopes in determining the ____ of fossils....?

(A) Size
(B) Age

(C) Shape
(D) Color

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In modern periodic table, how many periods are there...?

(A) 7
(B) 8

(C) 9
(D) 6

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Which mineral is the present in meats, eggs, table salt, fruits and vegetables...?

(A) Sodium
(B) Iodine

(C) Calcium
(D) Magnesium

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What is the body’s natural or acquired ability to resist certain diseases...?

(A) Immunity
(B) Endocrine

(C) Exocrine
(D) All of above

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Acid rain is mainly caused by emissions of __________ in the atmosphere...?

(A) Sulfur Dioxide and Potassium Nitrate
(B) Sulfur and Charcoal

(C) Nitrogen Oxide and Potassium Nitrate
(D) Sulfur Dioxide and Nitrogen Oxide

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