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Explain how the evaporation of a liquid causes the temperature of the remaining liquid to decrease.

(Explain within the lesson)
FM
Answered by Finlay M. • Physics tutor
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Give the definition simple harmonic motion and write down the defining equation for such motion stating the meaning of any symbols involved.

Simple harmonic motion is defined as a form of periodic motion in which a point or body oscillates in such a way that the acceleration of the point or body is directly proportional to its displacement from t...
BH
Answered by Benjamin H. • Physics tutor
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What happens to the pressure inside a gas-filled ball when the temperature is increased? Explain your answer, stating the assumption made.

From definition of pressure have P=F/A (in reality for a ball we are talking about infinitesimal areas, but the general definition is sufficient at this level). Assume that the area of the surface under cons...
JH
Answered by James H. • Physics tutor
2415 Views

How do I approach this question? Our teacher never explained it in class!

Any question in physics will boil down to a simple conservation law, even at the relatively difficult A level exams. Basically, in order to successfully solve this question, you need to identify 3 key things...
FP
2186 Views

What is dimensional analysis and how is it used?

When one is faced with a problem requiring derivation of an equation, they might be asked to use dimensional analysis . This is a concept that involves analyzing the units of known quantities (usually it is ...
CI
Answered by Christina I. • Physics tutor
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