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Describe the flow of blood through the human circulation

Blood needs to circulate around the body in order to supply organs with nutrients and oxygen and to remove waste. Blood is oxygenated in small, one cell thick vessels in the lungs. These flow together to for...
AM
Answered by Antonia M. • Biology tutor
3500 Views

Why did Hitler fail to invade Russia in 1941?

The short answer is that Hitler was unprepared to fight a long war in Russia during the mud season (Rasputitsa) and against a Russian people so zealous in their patriotism and belief in the red state. Hitler...
WW
Answered by William W. • History tutor
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How does the first ionization enthalpy change down group 2?

First ionization enthalpy is the energy required to remove one electron from each atom in one mole of gaseous atoms, forming one mole of gaseous 1+ ions. The first ionization enthalpy is largely dependent on...
MS
Answered by Matthew S. • Chemistry tutor
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The line L1 has vector equation,  L1 = (  6, 1 ,-1  ) + λ ( 2, 1, 0). The line L2 passes through the points (2, 3, −1) and (4, −1, 1). i) find vector equation of L2 ii)show L2 and L1 are perpendicular.

i)L(r) vector line equations in general are in the form L(r) = p1 + λ (p2) where p1 is any ponit on the line and p2 is the vector direction of the line(unsure how to get the whiteboard up or i would describe...
CE
Answered by Charles E. • Maths tutor
8430 Views

Factorise 12x^2 - 20x + 3

We know our answer is going to look like this: (ax + b)(cx + d). First we can split our original equation in order to make it easy to simplify. As we know that 12 multiplied by 3 is equal to 36 we can split ...
EG
Answered by Emma G. • Maths tutor
4791 Views