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What are the four chambers of the heart and what do they do?

The four chambers are called the right atrium, the left atrium, the right ventricle and the left ventricle. Deoxygenated blood enters the right atrium and is pumped into the right ventricle. The blood is ...

HM
Answered by Hannah M. Biology tutor
8623 Views

Solve the quadratic equation X^2+3X+2=0 by factorisation.

There are different ways of solving quadratic equations but this one asks for you to solve by factorisation. This is where you take the equation on the left hand side and rewrite it into brackets - two bi...

AM
Answered by Annabelle M. Maths tutor
8859 Views

List the following compounds in order of increasing acidity in aqueous solution, giving reasons for your choices: HCl, HI, HBr, HF.

The acidity of a compound is measured by its pKa, which is defined as: pKa=-log([H+]) ([H+] is the concentration of H+ in solution). As [H+] increases, pKa decr...

PS
Answered by Promeet S. Chemistry tutor
22639 Views

Why does adding a constant to a function's input (as in f(x-a)) shift the plot of the function along the x-axis?

Imagine the function f(x) as a black box which takes in any value x and produces an output y. The black box acts on its input according to a rule which produces a unique value of y for a given x. If the b...

JH
Answered by James H. Maths tutor
7632 Views

I'm applying to study a subject I have never studied before; how can I show universities I am a good fit for this degree?

Universities are interested in who you are as a person, not just as a results sheet. University is a time to finally focus on studying something you are truly interested in, so you need to show through yo...

LM
8638 Views

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