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A capacitor discharge circuit of time constant 45ms includes a capacitor and resistor. The capacitor has a capacitance of 18µF What is the resistance of the resistor?

This question is in one of the CIE Physics Pre-U sample papers, and if you know the definition of the time constant for a capacitor circuit (=RC), its very easy, however even if you didnt it canbe derived fa...
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Answered by Sam C. • Physics tutor
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What are the basic functions of the different 'cases' in Latin?

Much like English, words within a Latin sentence have different purposes in order to form a complete sentence. The 'cases' in Latin are a way to describe and identify the various functions of nouns only. In ...
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Answered by Amelia G. • Latin tutor
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Simplify (3x^2 - 15x)/(3x^2 - 13x -10)

Begin by considering the numerator and denominator separately, simplify both: 1) 3x^2 - 15x Here, a common factor of 3x can be removed to give 3x(x^2 -5). 2) 3x^2 - 13x -10 This involves using two brackets e...
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Answered by Gabriella O. • Maths tutor
9187 Views

What types of enzymes are there?

There are generally three types of enzymes.Amylase (Carbohydrate) enzymes, Pepsin (Protease) enzymes and lipase enzymes.Amylases break down starch in carbohydrates into sugars that can be used by the body. T...
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Answered by Hibba S. • Biology tutor
4783 Views

‘Systems of prediction, preparation and prevention are so well developed, catastrophe is avoidable.’ In the context of volcanic hazards, discuss the extent to which you agree with this view. (40 marks)

As this is a 40-mark question, I will not attempt to provide a full-length sample answer, but instead offer guidance on how to structure this type of question. More detailed case studies and content advice w...
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Answered by Olivia M. • Geography tutor
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