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Interestingly, pure water will always be neutral, regardless of pH. To understand why, we have to properly look at what pH means. pH is a measure of the number of free H+ ions in a solution or liquid. The...

Firstly, we translate the information give into Maths equation. Therefore, A+D=£63 (the amount of many the spend on the tickets). Given the amount spent by Amy, we can find the total amount Dan spends: D=...

its a process that a phagocyte completes in order to remove any unwanted pathogens and organism. I will show pictures and diagrams explaining the process to the student. once the phagocyte has ingested th...

So, the first thing to look at in long answer questions is the number of marks they're awarding. The next is to read the question a few times over and make sure you really understand what they're asking f...

We have two reliable methods of solving this simultaneous equation. We can either eliminate the variables (x or y) directly, or make one of the variables the subject of the equation. I will show you how t...