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Explain the meaning of the term ‘externality’ and give an example of one that is negative.

In Economics, externalities occur when producing or consuming a good/service causes an impact on third parties not directly related to the transaction. These impacts can be both positive or negative. Graphic...
TD
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Express 56 as a product of prime factors in its simplest form

A prime factor is a factor (or divisor) that cannot be divided by another number.So we start with the first prime number 2: 56 / 2 = 28.8 is even, so we can divide by 2 again, 28 / 2 = 14.14 is even so we ca...
JK
Answered by John K. • Maths tutor
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HIV is diagnosed by blood tests. State two safety precautions that need to be taken when handling blood samples.

In order to make sure that safety precautions are met, when handling blood samples we must make use of gloves in order to cover all cuts and avoid contact. Furthermore, you must store samples in sealed conta...
Answered by • Science tutor
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Describe the process of speciation.

A population is split into two groups by some form of barrier, either physical, such as a mountain range, or behavioral, like looking for food at different times of day. This means that the two populations c...
JM
Answered by James M. • Biology tutor
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Describe how a metal conducts electricity

In order for something to conduct electricity, there must be charged particles within the substance and these charged particles must be free to move.Metals consist of positive ions in a sea of delocalised el...
AC
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