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You use the sine rule (a/sina=b/sinb) when you know 2 angles and one side amd you want to find out what the length of the side opposite one of the angles is. 

To solve this question we use the product rule, where we differentiate one variable whilst keeping the other constant, and vice versa, adding the two results together to get our answer. A helpful formula ...

x=4

y=3

Specific heat capacity does tell you how much energy a substance needs to increase their temperature and so substances with a low specific heat capacity (SHC) will increase in temperature more rapidly tha...

Firstly, let's rewrite each of these equations as the equation of a line i.e. in terms of y. So we have:

(1) y = 4x/3 - 11/3

(2) y = 2 - 3x/2

Draw line (1) on a graph. The (x,y) co-or...