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How do you calculate the total resistance of two resistors, R1 and R2, when they are in series and when they are in parallel?

When resistors are in series you may add up their resistances to find the total resistance, R Total = R1 + R2. However, when resistors are in parallel, it gets a little more complicated. You must use the equ...
JM
Answered by Jamie M. • Physics tutor
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What are the differences between intermolecular and intramolecular forces?

Intermolecular forces are forces between separate molecules that hold the substance together. There are three main types; dipole-dipole interactions, hydrogen bonding and London dispersion forces, which are ...
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Answered by Jamie M. • Chemistry tutor
33655 Views

How do you complete the square?

You start off with a formula in the form y = x 2 + bx. The first step is to add the square of half of the coefficient of x: (b/2) 2 . This allows us to rearrange the formula into (x+ b/2) 2 . However, our fo...
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Answered by Jamie M. • Maths tutor
3432 Views

a) Give a balanced equation for the complete combustion of butane, b) Explain how this would change if there was insufficient oxygen present, and explain the problems this causes

C 4 H 10 + 6.5O 2 -> 4CO 2 + 5H 2 O If there is not enough oxygen, incomplete combustion will occur, so CO (carbon monoxide) will be formed, carbon will form soot, and unburnt hydrocarbons will be release...
AP
Answered by Abigail P. • Chemistry tutor
11618 Views

To what extent was Neville Chamberlain's policy of appeasement responsible for the rise of Hitler and the eventual start of the Second World War?

Although Neville Chamberlain is often blamed for being solely responsible for allowing Hitler to mobilise a Germany that was spoiling for war, the extent to which this is the main reason is limited. A Europe...
HF
Answered by Harry F. • History tutor
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