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What is the difference between a series circuit and a parallel circuit?

In a series circuit, the electrons passes through each component in order before returning to the cell. In a parallel circuit, there are different paths for the electrons to take so the current splits depend...
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Answered by Ewan H. • Physics tutor
14701 Views

How do I differentiate f(x) = cos(x)/x?

To answer this question you need to use the quotient rule. dy/dx = (vu' - uv')/v 2 . U = cos(x) which differentiates to -sin(x) so u'= -sin(x) v = x so v' = 1 Therefore, dy/dx = ( -xsin(x) - cos(x) ) / x 2
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Answered by Ewan H. • Maths tutor
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Express X/((X+1)(X+2)) in partial fractions. OCR C4 style question

This question is asking us to split up the fraction into two separate fractions.To begin we use one of the standard forms for solving partial fractions, this is (A/(X+1))+(B/(X+2)).To solve set the first equ...
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Answered by David S. • Maths tutor
12617 Views

There are 200 students in Year 10 110 are boys. There are 250 students in Year 11 140 are boys. Which year has the greater proportion of boys? (Taken from Nov 2014 AQA Unit 2)

To work this out we need to calculate the percentage of boys in year 10 and year 11. Then we can compare them to find which year has the greater proportion of boys.For Year 10 there are 110 boys out of 200 s...
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Answered by David S. • Maths tutor
6664 Views

What is the subjunctive and when should it be used?

The subjunctive is a mood (not tense) used fairly commonly in Spanish. It can be formed in the present and past tenses (the present form of subjunctive is used when talking about the future also). At GCSE le...
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Answered by Kieran N. • Spanish tutor
9610 Views