Top answers

What experience do I need?

In terms of experience, some people say the more you do the better but I believe that it is more what you get out of the experience than how many you do. It is better to do 1 or 2 and learn a lot than do 5 o...
JP
1554 Views

What do the arrows in mechanisms represent?

The arrows represent the movement of a lone pair of electrons. For example, if a mechanism involves an oxygen atom forming a bond with a proton (hydrogen ion), then the oxygen would ‘donate’ a lone pair to t...
TK
Answered by Tarek K. • Chemistry tutor
3481 Views

How does DNA replication work?

First, the DNA Helicase enzyme ‘unzips’ the two stranded DNA by breaking the hydrogen bonds present between the complimentary base pairs on the two opposing strands. Then this leaves two exposed strands, all...
TK
Answered by Tarek K. • Biology tutor
3338 Views

What is a cadence?

A cadence is made up of two chords which signal the end of a musical phrase. There are four different kinds:The Perfect Cadence is really recognisable because we hear it all the time! It is a chord V followe...
KW
Answered by Kate W. • Music tutor
5662 Views

What is the difference between "ser" and "estar"

A general way of differentiating the two verbs is by using "ser" for permanent states and "estar" for more temporary ones. For example: "estoy aburrido" means "I'm bored&qu...
RD
Answered by Rachel D. • Spanish tutor
2877 Views