SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The density of aluminum is 2.7 gcm^3. What is the mass of a cube of aluminium of sides 2.0 cm?
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1.35 g
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5.4 g
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10.8 g
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21.6 g
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Explanation:
Detailed explanation-1: -Answer and Explanation: We will calculate first the volume of the cube. The mass of aluminum is equal to 21.6 grams.
Detailed explanation-2: -Aluminium has a density of 2.7 g/cm 3 = 2, 700 kg/m 3.
Detailed explanation-3: -Aluminium (atomic mass = 27) crystallises in a cubic system with edge length of 4A. Its density is 2.7gcm−3.
Detailed explanation-4: -The meaning of the given statement is as follows-The density of a substance is the mass of unit volume of that substance. So, density of aluminium is 2.7 grams/cc means that, mass of 1 cm³ volume of aluminium is approximately 2.7 grams.
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