Top answers

Describe what happens to a star, after the main sequence period, for the star to eventually become a black dwarf. (5 Marks)

After the main sequence period, the amount of hydrogen in the stars core decreases causing the star to fuse helium nuclei instead. (Further explanation for clarification)This releases a lot of energy causing...
TC
Answered by Tate C. • Physics tutor
13895 Views

Give one advantage and one disadvantage of using nuclear power stations rather than gas-fired power stations to generate electricity. (2 Marks)

Advantage- No CO2 emissions produced by nuclear power stations as they do not combust fuel to produce energy.Disadvantage- Nuclear power stations produce radioactive waste which is difficult and expensive to...
TC
Answered by Tate C. • Physics tutor
21642 Views

How do you use the grammar particle 了(le)?

了is one of the most commonly encountered grammar particles in the modern Chinese language and also one of the most difficult to grasp. The particle 了 can have many different functions in a sentence. Here are...
AJ
4379 Views

Solve the equation 3^(5x-2)=4^(6-x), and show that the solution can be written in the form log10(a)/log10(b).

So we have the equation initially in the form 3^(5x-2)=4^(6-x), and as the solution involves log10, then a sensible first move would be to take log10 of both sides, giving log10(3^(5x-2)) = log10(4^(6-x)). U...
EB
Answered by Eloise B. • Maths tutor
6545 Views

Prove that (sinx + cosx)^2 = 1 + 2sinxcosx

Starting on the left hand side we can expand out the brackets to get: (sinx + cosx)(sinx + cosx) sin 2 x+sinxcosx+sinxcosx+cos 2 x Grouping together the like terms we can rearrange it to be: sin 2 x + cos 2 ...
AG
Answered by Adam G. • Maths tutor
12549 Views