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What are positive and negative feedback loops?

Feedback loops are a series of events which are triggered by an initial change. Positive feedback loops are feedback loops which amplify the initial change and lead to a repetition of the cycle. An example o...
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Answered by Matthew F. • Geography tutor
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How do you calculate the net social welfare loss due to a negative externality in production?

If there exists a negative externality in the production of a good or service (eg. coal power station emitting greenhouse gases) the Marginal Social Cost (MSC) to society of producing the good will exceed th...
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Answered by Scott N. • Economics tutor
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What are the factors affecting Cross-Price Elasticity?

First, it is important to understand the difference between own price elasticity and cross-price elasticity.Own price elasticity concerns about the responsiveness of the the quantity demanded of good X to a ...
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Answered by Helen C. • Economics tutor
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What is the difference between an animal cell and a plant cell?

It's easy to tell the difference between an animal cell and a plant cell when you look at it,because a plant cell has a rigid wall around it. This keeps the cell in the right shape. An animal cell looks a bi...
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Answered by Elizabeth O. • Biology tutor
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How do I solve the following question. 'Find the values of x such that 2log3(x) - log3(x-2) = 2'.

How do I solve the following question. 'Find the values of x such that 2log 3 (x) - log 3 (x-2) = 2'.To simplify this equation in order to solve it, the first step is to simplify the 2log 3 x term. The log r...
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Answered by Lauren R. • Maths tutor
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