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Consumer surplus is the benefit to people who want to buy a certain good that comes from the good being cheaper than what the consumer would be willing to pay; in other words, it is the difference between...

EM waves invariantly travel at the speed of light, and can do so in a vacuum. They transfer energy from their source to the absorber. Some kinds of EM waves can be reflected and refracted. The spectrum of...

A main weakness of animal studies is that animals have a different physiology to humans. This means that any studies on animals cannot be accurately related to humans, making them invalid. For example, hu...

Active transport is a process where particles move from an area of low concentration to an area of high concentration against a concentration gradient. In order for particles to move against a concentrati...

Use the easy to remember acronym ITEEAL - idea, theorist, example, explain, analyse and link. Let's take an example A - level Sociology families and household 10 marker , 'Outline and briefly explain two ...