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Describe how volcanoes are monitored so that people can prepare for an eruption.

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Answered by E R. • Geography tutor

24216 Views

Derive I = nAVe

Over 1 second, electrons with drift velocity V travel through a wire of cross sectional area A. Distance Vt (t = 1) multiplied by area A gives a volume AV. This volume multiplied by the electron dens...

Answered by Dojcin D. • Physics tutor

72195 Views

What is 'cotx'?

cot is a short way to write 'cotangent'. This is the reciprocal of the trigonometric function 'tangent' or tan(x).

Therefore, cot(x) can be simplified to 1/tan(x).

Using trigonometric...

Answered by Lucy G. • Maths tutor

166729 Views

What is a phagocyte?

Phagocytes are types of cells found in the bloodstream and tissue. They are an important part of the immune system. They recognise foreign antigens on invading pathogens and engulf them. They then dig...

Answered by Lucy G. • Biology tutor

5766 Views