Top answers

what is a standing wave and how is it formed ?

A standing wave is the interference of two sinusoidal waves travelling in opposite directions, confining the wave and its energy to a fixed position, creating nodes and anti nodes . nodes - points where the ...
DN
Answered by Danielle N. • Physics tutor
2180 Views

How should I structure my personal statement?

It is important to remember that your personal statement should be ' personal '. Therefore, whilst you will need to tick boxes that the admissions tutors are looking for, it should also say something unique ...
JP
1780 Views

Evaluate the role of technology in prolonging the First World War (IB History Exam Question)

The Examiner is looking for a nuanced but strong answer. Technology's rapid development during WW1 gave rise to the belief that it would cut the war short. However, each technological innovation was quickly ...
TB
Answered by Tim B. • History tutor
4471 Views

Define the an acid/base according to the Bronsted-Lowry and Lewis theories. Support with equation to illustrate an acid-base reaction for each theory, identifying them clearly. Also state the bond type formed in an Lewis acid-base reaction.

Bronsted-Lowry theory: Acid is a proton donor (H + ) and base is a proton acceptor, i.e NH 3 (aq) + H 2 O (l) ⇌ NH 4 + (aq) + OH - (aq) (In the left hand side, the H 2 O is donating a proton thus is the acid...
AV
3101 Views

3x + x = 12. Find x

Due to the fact that the two 'x' in the question do not have a power (Are not squared or cubed) they can be added. Thus:4x = 12Then we want to find 'x' so we isolate it in the equation. To do this, we need t...
TD
Answered by Tanika D. • Maths tutor
2156 Views