During which process does heat transfer occur because of density differences__________...? Mcqs

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During which process does heat transfer occur because of density differences__________...?

(A) Convection
(B) Radiation

(C) Conduction
(D) None of these

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Speed of sound in water at 20 °C is___________...?

(A) 1450 m/s
(B) 1474 m/s

(C) 1498 m/s
(D) 1500+ m/s

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Ten identical steel balls, each with a mass of 27 g, are immersed in a measuring cylinder initially containing a certain volume of water. The water level rises by 50 cm³ after immersing the balls. What is the density of the steel...?

(A) 0.90 gm/cm^3
(B) 8.1 gm/cm^3

(C) 9.0 gm/cm^3
(D) 13.5 gm/cm^3

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If the container of enclosed gas heated, what will happen inside the container...?

(A) Pressure will be increased
(B) Pressure will be decreased

(C) Pressure will remain constant
(D) Volume will be increased

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The main constituent of hemoglobin is___________...?

(A) Chlorine
(B) Iron

(C) Calcium
(D) None of these

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The Sun is at an average distance of about________ million kilometers away from Earth...?

(A) 100 million
(B) 150 million

(C) 200 million
(D) 250 million

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The presence of a dielectric between the plates of capacitors, the capacitance of capacitor ______...?

(A) Increases
(B) Remain constant

(C) Decreases
(D) Remain uncharged

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Which is the extension not suitable to an MS Word file...?

(A) .doc
(B) .rtf

(C) .docx
(D) .jpeg

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What occurs in metaphase of mitosis...?

(A) Chromosome line up on the equator of the cell
(B) Chromatids reach the poles of the spindle

(C) Chromatids separate and move to opposite poles
(D) Chromosomes start to coil up and become visible

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Atoms that gain electron will become negatively charged ion and they are known as...?

(A) Ion
(B) Cation

(C) Isotope
(D) Anion

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