Top answers

Explain the cosmological argument

Three forms of the cosmological argument: from motion; from causation; form contingency. First two respectively run as follows: (1) everything we observe in the world is moving/has a cause; (2) nothing can m...
SR
2924 Views

Solve the following system of simultaneous equations: y=x^2 - 5x + 4 ; x+2y=19

Sub y=x^2 - 5x + 4 into x+2y=19x+2(x^2 -5x + 4) = 19x + 2x^2 -10x + 8 =192x^2 - 9x -11 = 0 (2x -11)(x+1) = 0x= 5.5x=-1
SR
Answered by Sulamaan R. • Maths tutor
5118 Views

differentiate with respect to x. i). x^(1/2) ln (3x),

From this we can see that equation has 2 parts therefore we should look to using the product rule which is used to differiantiate a two functions multiplied together so (fg)'=f'g+fg'. In this question the di...
JD
Answered by Jesse D. • Maths tutor
7829 Views

Describe how haemoglobin binds to oxygen:

The binding curve of haemoglobin to its substrate is sigmoidal ('s' -shaped). Haemoglobin has four subunits, each of which will bind one molecule of oxygen. The reason for the sigmoidal shape is the process ...
EB
Answered by Emma B. • Biology tutor
4324 Views

Explain how red blood cells are adapted to carry oxygen.

Firstly, red blood cells contain the globular protein haemoglobin which is able to bind reversibly with oxygen. This means red blood cells can take up and then release oxygen as they transport it around the ...
LC
Answered by Laura C. • Biology tutor
17163 Views