Practice Pakistan questions with answers and explanations.
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If two systems are each in thermal equilibrium with a third, they are in equilibrium with each other.
This permits consistent temperature measurement.
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Specific heat capacity describes thermal inertia.
Materials with high values require more heat for the same temperature rise.
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The word 'happily' describes how the children played.
A word that modifies a verb in this way functions as an adverb.
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In this sentence, 'light' names a thing that can be turned off.
Therefore, it functions as a noun rather than a verb or adjective.
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'Under' shows the spatial relationship between the keys and the cushion.
Words that express such relationships are prepositions.
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'But' joins two independent clauses of equal grammatical importance.
It is one of the standard coordinating conjunctions.
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'Honesty' names a quality rather than a physical object.
Names of qualities, ideas, or states are abstract nouns.
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'Alas!' expresses sudden emotion, especially sorrow or regret.
Such standalone emotional expressions are interjections.
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Continuity gives A₁v₁=A₂v₂.
V₂=0.06×2/0.02 = 6 m/s.
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Strain is extension divided by original length.
0.004/2 = 0.002.
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Weight is W=mg.
W=8×9.8 = 78.4 N.
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Density is mass divided by volume.
ρ=600/0.5 = 1200 kg/m³.
