Search our library of homework questions

Top answers

All subjects

All levels

Define the term 'first ionisation energy' and explain why the first ionisation energy shows a general increase across period 2

The first ionisation energy is the energy required to remove an electron from each atom in one mole of gaseous atoms to produce +1 charged gaseous ions.The first ionisation energy shows an general increas...

Answered by Naledi N. • Chemistry tutor

4631 Views

By referencing the magnetic field and the alternating potential difference explain how a cyclotron produces a beam of high speed particles.

The difference in potential between the two Ds of a cyclotron accelerate the particles across the gap. The direction of potential difference switches every half cycle to keep the particles accelerating. T...

Answered by Gareth R. • Physics tutor

4877 Views

When do I use être when forming the perfect tense?

It can seem confusing when deciding whether to use avoir or être to form the perfect tense. As a rule of thumb the conjugated form of avoir is used except with:
a)Reflexive verbs.Eg: se lever - to ge...

Answered by Isobel W. • French tutor

1004 Views

Describe the time complexity for the search operation in a binary search tree.

Since the question asks for the time complexity we should consider both the average and the worst time complexities. In a binary search tree the values are sorted such that for each node the elements bigg...

Answered by Volf A. • Computing tutor

3926 Views

What is the imperative mood and how do you form it?

The imperative mood in French is used to give commands and make suggestions, and translates into English as the commanding "do this!" or the suggestive "let's...".
The commanding...

Answered by Thomas U. • French tutor

1991 Views