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Oxygen is exchanged between the blood capillaries and the tissues. Give two ways in which capillaries are adapted for exchanging blood with the tissues.

Thin walls for short diffusion path 2. Narrow, so have a large surface area to volume ratio
LG
Answered by Leila G. • Biology tutor
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Differentiate with respect to x: i) y=x^3ln(2x) ii) y=(x+sin(2x))^3

i) There first step is to acknowledge the need for both product rule (d(uv)/dx=v.du/dx+u.dv/dx) and chain rule (dz/dx=dz/dy*dy/dx). Here, u=x^3 and v=ln(2x). Therefore, du/dx=3x^2 which is a standard differe...
EM
Answered by Edward M. • Maths tutor
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An aeroplane lands on the runway with a velocity of 50 m/s and decelerates at 10 m/s^2 to a velocity of 20 m/s. Calculate the distance travelled on the runway.

Firstly, we note that the acceleration is constant, therefore this problem should be tackled with the SUVAT equations. Let's write down the information we have: s we are asked to find this u = 50 m/s v = 20 ...
PF
Answered by Paolo F. • Physics tutor
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How do I approach an unseen question in an exam situation?

Being presented with an unseen text in a timed exam can seem intimidating, but actually this question is an opportunity to boost your marks. This is the only situation when everyone taking the exam is in the...
RG
Answered by Ruby G. • English tutor
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Describe in detail three key features of the Baroque era.

Continuo - an accompaniying part of the baroque ochestra that provides the bass line. This is played by either a keyborad instrument (harpsichord/ organ), or a low string instrument (cello/ double bass). It ...
KC
Answered by Kathy C. • Music tutor
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