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What is the difference between a vector and a scalar quantity?

A vector describes both magnitude and direction, whereas a scalar only describes the magnitude. A common example is speed and velocity. Speed is a scalar, it describes only how fast something is going and ve...
PK
Answered by Patricia K. • Physics tutor
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Simplify (3x^2 - 6x)/ (6x^3 - 19x^2 + 9x +10)

3x(x-2)/(2x+1)(x-2)(3x-5) 3x/(2x+1)(3x-5)
Answered by • 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
5389 Views

Explain how oestrogen can lead to the development of breat cancer

Oestrogen is a lipid soluble molecule, so it diffuses into the cell across the plasma membrane. It then binds to a recptor inside the cell and this causes it to relocate to the nucleus. The receptor then act...
JM
Answered by James M. • Biology tutor
3572 Views

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
4177 Views