Top answers


Prove that √2 is irrational

Prove by contradiction: Assume negation to be true i.e. √2 is rational Then √2 can be written in the form a/b where a and b are integers with no common factor (the fraction cannot be simplified) => a/b = ...
PM
Answered by Paul M. Maths tutor
8275 Views

Explain why a transformer is used in electrical power lines.

Power stations use step-down transformers to decrease the voltage of the electrical output. The power lines have a constant resistance (say, R Ohms) which means there is a power loss across the lines given b...
ZM
Answered by Zubair M. Physics tutor
3891 Views

Explain why the pressure exerted by a gas increases as they are heated at constant volume, with references to the kinetic theory of gases.

The kinetic theory models gas particles as points moving around with a given velocity. Heating the particles causes the transfer of heat energy, which is then used to increase the particles kinetic energy. T...
ZM
Answered by Zubair M. Physics tutor
6399 Views

How would you test for the presence of a non-reducing sugar?

We can check for the presence of non-reducing sugars the Benedick's Test. If a reducing sugar is present in a solution, adding Benedick's reagent and heating will form an insoluble red precipitate. Non-reduc...
JO
Answered by Jess O. Biology tutor
118400 Views

What should I be doing now to best enhance my medical school application?

Being a doctor is a difficult job and requires more skills than just being good at biology. Medical schools are looking to see if you have these skills and that you understand what you're getting yourself in...
ZZ
2102 Views