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# NSAA Cambridge Physics help watch

Can somebody explain question 1iv to me I have no idea what molecular speed is.
2. When I did the question, I was told that it wasn't worded very well.

In part (ii), you calculated that the highest speed is 460.8 m/s.
That is the fastest speed it can travel to get from one slit to another.

It can go at slower speeds as well. I passes the first slit and gets to the second one after the disc has rotated 30 + 360 degrees.

Use the same method as part (ii) to calculate the time it takes to rotate 390 degrees and that calculate the speed of the molecule using this time and the distance.

Hope that helps!!
3. (Original post by Just Somebody)
When I did the question, I was told that it wasn't worded very well.

In part (ii), you calculated that the highest speed is 460.8 m/s.
That is the fastest speed it can travel to get from one slit to another.

It can go at slower speeds as well. I passes the first slit and gets to the second one after the disc has rotated 30 + 360 degrees.

Use the same method as part (ii) to calculate the time it takes to rotate 390 degrees and that calculate the speed of the molecule using this time and the distance.

Hope that helps!!
This is one of those questions where answering what you want actually works. -_- I looked up molecular speed and thought that it was something from thermal physics which I'm pretty sure that I'm starting the week after the assessment.

Would you be able to explain biii and 2d?
Is it just me or is the second question much easier than the first question?
4. halp
5. Okay I get 2d, it's kind of stupid in my opinion since I didn't realise that having over the 2.4V required is okay. :/
6. To be honest, I am having trouble understanding question 2.

It doesn't make any sense!!!!
7. Are you doing both physics questions in the actual paper?
I think the chemistry question 3 is quite good and easy to understand. You could try that one.

As for question 2, I'm really sorry but I don't get it myself.
8. (Original post by Just Somebody)
To be honest, I am having trouble understanding question 2.

It doesn't make any sense!!!!
(Original post by Just Somebody)
Are you doing both physics questions in the actual paper?
I think the chemistry question 3 is quite good and easy to understand. You could try that one.

As for question 2, I'm really sorry but I don't get it myself.
lol dw about it I get question 2 now. I found that much easier than question 1. I'm slightly doubtful about question 3 as I already struggled with the dot cross diagrams lol. I think that I'm likely to do both physics questions.

Updated: October 29, 2017
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