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How do I think of evaluation points in exam essays?

It's impossible to remember evaluation points for every possible essay that may come up on the exam, so it's a good idea to always think of what's covered in the Issues and Debates topics, and apply it to th...
OJ
Answered by Oscar J. • Psychology tutor
5302 Views

The following equilibrium is set up in a glass syringe. 2(NO2) (brown gas) ‹-› N2O4 (colourless gas) ∆H = -58 kJmol-1. Using le Chatelier's principle, predict and explain how heating up the mixture would affect it's appearance.

At first this question can seem confusing, but by breaking it down we can better understand what we are being asked to do. Firstly, we need to recall le Chatelier's principle - that an equalibrium will shift...
RS
Answered by Robert S. • Chemistry tutor
5782 Views

What is meant by the doppler effect?

The doppler effect is the change in frequency and wavelength of waves coming from a wave source moving relative to you. If a wavesource is stationary then the waves in all directions all have the same freque...
TD
Answered by Thomas D. • Physics tutor
2543 Views

How do you resolve forces on an object on an angled plane?

The forces should be resolved in two directions: parallel to the plane, and perpendicular to the plane. Friction will act parallel to the plane (up the slope), and the normal force wil act perpendicular to t...
BG
Answered by Benjamin G. • Maths tutor
7070 Views

Show that 6sin(60◦) + 5tan(60◦) can be written in the form √k where k is an integer.

sin(60◦) = √3 /2 tan(60◦) = √3 6sin(60◦) + 5tan(60◦) = 3√3 + 5√3 = 8√3 = √64√3 = √192
AG
Answered by Alistair G. • Maths tutor
4370 Views