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What is the most difficult topic in HL Maths?

It will mainly depend on your own interests, so there is no definite answer. In my opinion, the whole calculus section is probably the most significant part of the course as it will take up a significant ...

Answered by Ambrose C. • Maths tutor

1813 Views

State the effect that increasing the temperature has on the rate of the reaction. Explain this effect in terms of particles and collisions.

This question is about understanding how reactions happen, what it means for something to react and the factors controlling reactions. Here it is important to know that for a reaction to happen particles ...

Answered by Jack N. • Chemistry tutor

16680 Views

Solve 2x + 7 = 13

In this question we are as to solve this equation and therefore find the value of x. This means we need to isolate x to find a value for it. To do this we use the reverse rules for BIDMAS whereby the firs...

Answered by Bilal B. • Maths tutor

22219 Views

(IGCSE, Jan 2013, q8 adapted) The astronaut David Scott dropped a hammer and a feather from rest, at the same time and from the same height on the moon. The hammer and the feather landed at the same time. Why?

Central to this question is an understanding of the difference between an accelerating object and an object travelling at terminal velocity. Firstly, the experiment is carried out on the moo...

Answered by Nadya K. • Physics tutor

5206 Views

In what ways did the lives of black Americans change during WWII?

The change brought by the war for black Americans was limited and contested. The war presented new demands for labour, generating opportunities for African Americans (AA) to economically participate, gain...

Answered by Abigail S. • History tutor

14499 Views