When you divide by a fraction, you turn it upside down and multiply. So yes the 2’s cancel. So you’re left with mu / x/u - that last bit is the fraction. It’s the same as mu times u/x. Does that help?
do we literally have to square the speed , take the mean and root it inorder to use it in the formula or can we just use the raw speed given in the questions data?
Oh no, they’ll likely give you either the ‘mean square speed’ which is c^2 or the ‘root mean square speed’ which… Do watch out for which it is though. Because often students forget to read it properly and then square the first one. You only have to go through that palaver if they give you a bunch of the speeds of the individual particles.
@@nutshellphy is the equation for an ideal gas pV = nRT or nkT ? I've seen topical past papers and in most ocassions, nRT is being used. R being a constant with a value of 8.31
There are 2 versions. nRT uses moles (n) and the molar gas constant (R), it’s on some specs and used to be on Edexcel a long time ago. But now we use NkT which uses no of molecules (N) and boltzmann’s constant (k). They multiply to the same thing but best to stick with what’s on our spec. You’ll have to in any case because they won’t use moles.
Amazing video please never stop
I'm still in awe how you're still replying to queries and being helpful even after 4+ months of posting this video. Hats off!
Thanks… I appreciate the nod! I really do like helping people get it.
can you explain how you got mu squared/x from 2mu/2x/u at 4:02 i dont do math so i dont rlly get it
like how u got u squared cuz i know the 2's cancel but like wouldnt the u's cancel as well?
When you divide by a fraction, you turn it upside down and multiply.
So yes the 2’s cancel.
So you’re left with mu / x/u - that last bit is the fraction. It’s the same as mu times u/x. Does that help?
@@nutshellphy thanks :)
do we literally have to square the speed , take the mean and root it inorder to use it in the formula or can we just use the raw speed given in the questions data?
Oh no, they’ll likely give you either the ‘mean square speed’ which is c^2 or the ‘root mean square speed’ which…
Do watch out for which it is though. Because often students forget to read it properly and then square the first one.
You only have to go through that palaver if they give you a bunch of the speeds of the individual particles.
@@nutshellphy is the equation for an ideal gas pV = nRT or nkT ? I've seen topical past papers and in most ocassions, nRT is being used. R being a constant with a value of 8.31
There are 2 versions. nRT uses moles (n) and the molar gas constant (R), it’s on some specs and used to be on Edexcel a long time ago. But now we use NkT which uses no of molecules (N) and boltzmann’s constant (k). They multiply to the same thing but best to stick with what’s on our spec. You’ll have to in any case because they won’t use moles.