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What is the distance between two points with x-coordinates 4 and 8 on the straight line with the equation y=(3/4)x-2

Firstly, to be able to find the distance between the two points we must find the y-coordinates of each point by substituting in the x values. For x=4y=3/4x4-2=1For x=8y=3/4x8-2=4Now that we know the coordina...
LD
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Work out the number of electrons, protons and neutrons in Silicon 29 isotope.

First look at the periodic table to find the atomic number - 14.Then if it is a stable atom with no valency, the electron number will be equal to the proton number - 14.To work out the number of neutrons, su...
JA
Answered by Jamal A. • Chemistry tutor
4107 Views

Balance the equation and write the products of this reaction. _Mg + _HCl -> _...... +_ ......

The products are a salt and hydrogen, MgCl 2 and H 2 .The balanced equation is: Mg + 2 HCl -> MgCl 2 + H 2 This is a metal/acid reaction.Mg is a Group 2 metal, so there are two electrons in the outermost ...
DF
2389 Views

I keep hearing about the 'subjunctive' - what is it? Do I need it? How do I recognise it?

The subjunctive mood can tend to seem a bit terrifying, but it's not as bad as it looks and you shouldn't have to worry about it too much for your exams at GCSE level. There are two forms of the subjunctive ...
TM
Answered by Thomas M. • German tutor
1491 Views

How does a vaccine work?

Vaccines contain strains of an attenuated Pathogen. This means there is a dead or inactive form of the virus you are protecting against in the vaccine. This could be a like DNA segments or some lipid membran...
RH
Answered by Robyn H. • Biology tutor
2465 Views