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Explain the law of supply and demand and why it is important.

The law of supply and demand is one of the fundamental concepts of basic economics. It is the foundation on which several economic theories have been built. The law of demand states the higher the price of a...
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Answered by Adriana G. • Economics tutor
30364 Views

How do you explain the change in membrane permeability as temperature increases?

Generally, increasing the temperature increases membrane permeability. At temperatures below 0 o C the phospholipids in the membrane don't have much energy and so they can't move much, which means that they'...
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Answered by Ella F. • Biology tutor
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Solve the simultaneous equations. 3x + 5y = 1 , 2x - 3y = 7

3x + 5y = 1 (eq 1) 2x - 3y = 7 (eq 2) Step 1 - 2* (eq 1) 6x + 10y = 2 (eq 3) Step 2 - 3* (eq 2) 6x - 9y = 21 (eq 4) Step 3 - eq 4 - eq 3 to cancel the x -19y = 19 Therefore, y = -1 (eq 5) Step 4 - sub (eq 5)...
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Answered by Ann L. • Maths tutor
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How do you go about answering titration equations?

First you need write out the balanced chemical equation. You will often be asked about iron(II) ions reacting with maganate(VII) ions or with dichromate ions, therefore it is easiest to learn these two equat...
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Answered by Ella F. • Chemistry tutor
3044 Views

A circular table top has diameter 140 cm. The volume of the table top is 17,150π cmᶟ. Calculate the thickness of the table top

The table is a cylinder so we'll need to use the equation for this shape: A = πr 2 h We're looking for the thickness of the table (which is the height) so let's rearrange this equation to make h the subject ...
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Answered by Lewis M. • Maths tutor
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