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As Q₃ remains stationary, it is clear that it is not accelerating. Thus we can deduce from Newton's second law that there is no resultant force acting upon the charge. However there are still e...

Question three is so daunting because, aside from it being the longest question of the paper, you are probably unused to analysing sources without knowing their context. Usually at A-Level or GCSE, you ar...

A cuboid has sides such that the longest side is two units more than the shortest side, and the middle length side is one unit longer than the shortest side. The total surface area of the cuboid is 52 uni...

Inflation is a continuous or persistent rise in the price level, or can be seen a fall in the value of money (if bread goes from costing £1 a loaf to £1.10, it means £1 becomes less valuable with the incr...

Barium reacts quicker with water than strontium as it has a lower first ionisation energy than strontium as barium has a larger atomic radius and so their is more shielding for the outer electrons. althou...