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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 coord...

Answered by Lee D. • Further Mathematics tutor

2394 Views

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,...

Answered by Jamal A. • Chemistry tutor

3921 Views

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

The products are a salt and hydrogen, MgCl₂ and H₂.The balanced equation is: Mg + 2HCl -> MgCl₂+ H₂This is a metal/acid reaction.Mg is a Gr...

Answered by Danielle F. • Chemistry tutor

2255 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 ...

Answered by Thomas M. • German tutor

1432 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 memb...

Answered by Robyn H. • Biology tutor

2388 Views