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The first line of defence is the skin. This forms a physical barrier that prevents any microorganisms from getting into the body. Acid in the stomach, due to the low pH, is another defence the body has. T...

You should first think of how you discovered your passion for the degree you are applying to. Then, you should convince the university that you have all the skills and knowledge required, and most importa...

Rearrange (1): y=2x+4

Subsitute this into (2): 4x²+(2x+4)²+20x=0

Simplify and collect like terms: 8x²+36x+16=0

Factorise: (2x+1)(x+4)=0

Therefo...

This question is taken from a 2016 GCSE past paper. In language exams there are lots of reading comprehension questions. For this question in an exam, there would be lots of different people's viewpoints ...

Both Magnesium Oxide and Sodium Chloride exist as a giant ionic lattices where each oppositely charged ion is held in place by a strong electrostatic attractions. These ionic bonds are strong and require ...