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Price elasticity of demand shows the responsiveness of the demand of a product to a change in price. This indicates the level of necessity or luxury of that good. For example, a litre of milk would be rel...

Thinking a bit outside the box, by connecting concepts such as assimilation and immigration with this question gives a new perspective. Ethnic minorities immigrating to the UK, for instance, may be worrie...

Glucose is a product of carbohydrate digestion, the absorption of which into the blood stream involves two main stages: 1) Diffusion into the blood: When carbohydrates are first broken down, there's a hig...

After the human embryo implants in the uterus, the site of the developing placenta begins to produce a chemical called human chorionic gonadotrophin (hCG). hCG is a hormone that is found in the blood and ...

We can find out whether lines are perpendicular by comparing their gradients. Each gradient should be the negative reciprocal of the other - for example, 3/2 and -2/3, or 4 and -1/4. (Writing the number a...