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What is diffusion?

Diffusion is described as the movement of molecules from a high concentration to a low concentration, through a concentration gradient until evenly spread out
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Answered by Anesha A. • Biology tutor
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How do you know when to use savoir or connaitre?

Savoir is used when you know a fact, or how to do something eg I know how to get there, I know that he arrived. It is followed by que/qui/comment... (that, who etc) eg Je sais qu 'il est arriveConnaitre is u...
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Answered by Monique K. • French tutor
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Find dy/dx where y=e^(4xtanx)

Here, we must apply both chain and product rules. The chain rule can be used to find the derivative of a function in the form e f(x) , like this one. However it is useful to know that this will result in the...
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Answered by Monique K. • Maths tutor
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Atmospheric Pressure is about 1.0x10^5 Pa. What is the downward force of the air on a desktop of surface area 1m^2?

Here we are dealing with force, pressure and area so we use the formula F=PA. We simply slot in the given numbers where P=1x10 5 , and A=1. The resulting force is 1x10 5 N.
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Answered by Monique K. • Physics tutor
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A 1.6m long string fixed at both ends vibrates at its fundamental frequency... (i)what is this frequency?

For the first part, we consult the formula c=fλ. This tells us that wavelength is inversely proportional to frequency.. ie as one increases the other decreases. This means the lowest(fundamental) frequency g...
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Answered by Monique K. • Physics tutor
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