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Contrast the processes of facilitated diffusion and active transport. (3 marks)

Facilitated diffusion involves the use of channel and carrier proteins to assist the diffusion of molecules or ions down a concentration gradient, as this is a passive process it does not require ATP (the un...
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Answered by Holly T. • Biology tutor
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Solve 3x^2 + 6x + 3 = 0

Since there is a common factor of 3 on the the left hand side of the equation, you can take that out as a factor: 3(x^2 + 2x +1) = 0 Then you you can divide both sides by 3: x^2 + 2x + 1 = 0 Now you need to ...
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Answered by Samarth G. • Maths tutor
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Describir la rutina diaria

It is important to know how to write a short essay in Spanish on your "daily routine" towards GCSE preparation. In this, you should include the relevant reflexive verbs - levantarse, ducharse, acos...
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Answered by Emma A. • Spanish tutor
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Using a diagram, explain how an economy's exchange rate is determined. 4 marks. AS Level The National and International Economy

The main part of the explanation will be through the use of the whiteboard during the session. An economy's exchange rate is determined by the demand and supply of its currency. The point at which the demand...
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Answered by Jenny M. • Economics tutor
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Given the function f(x)=ax^2+bx+c, we are given that it has x-intercepts at (0,0) and (8,0) and a tangent with slope=16 at the point x=2. Find the value of a,b, and c.

Firstly, to begin this problem we must think of the best way to substitute the given values into the formula. For a start, we are given the tangent at x=2. In other words, this is equal to the derivative at ...
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Answered by Alejandra A. • Maths tutor
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