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struggling with root mean square

I do not understand it at all, the way my physics teacher taught it has left me more confused. Does anyone have any useful websites/videos whatever to help with revising this?

I have a mock on unit 1 on Tuesday, so need to get this done.

(AQA Spec A)

Thanks
Original post by mikaela_pascal
I do not understand it at all, the way my physics teacher taught it has left me more confused. Does anyone have any useful websites/videos whatever to help with revising this?

I have a mock on unit 1 on Tuesday, so need to get this done.

(AQA Spec A)

Thanks


You need to tell us what, exactly you don't understand.
The definition?
The application in various formulas?

I'll start you off

If 5 atoms have speeds 1,2,3,4 and 5 units.
The mean-square speed is the mean of the squares, so to find it you do
1²+2²+3²+4²+5² = 55 and divide by 5 giving 11
The root mean square is the square root of this. Which equals 3.3 approx.
Original post by Stonebridge
You need to tell us what, exactly you don't understand.
The definition?
The application in various formulas?

I'll start you off

If 5 atoms have speeds 1,2,3,4 and 5 units.
The mean-square speed is the mean of the squares, so to find it you do
1²+2²+3²+4²+5² = 55 and divide by 5 giving 11
The root mean square is the square root of this. Which equals 3.3 approx.


Everything, mostly the application of it. I've attempted some past paper questions on it but I still don't get it
Original post by mikaela_pascal
Everything, mostly the application of it. I've attempted some past paper questions on it but I still don't get it


Then you need post something specific. I suggest one of the questions you don't understand, telling us what it is you are stuck on, and how far you can get with it.
It's impossible, on here, to write the textbook explaining everything about root mean square speed. We need to start somewhere.

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