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Urgent A level Physics help! :(

Can someone please help me with these two questions, it's my homework :smile: The first question, I don't know much about the "Newton meter" and I don't get the second question, thanks in advance <3 :smile:

(edited 7 years ago)

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Original post by hamza772000
Can someone please help me with these two questions, it's my homework :smile: The first question, I don't know much about the "Newton meter" and I don't get the second question, thanks in advance <3 :smile:



For the first - Newton metre (for pressure I believe), nanometre, millimetre and megametre? Then state SI units to show the difference I guess

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Original post by Matrix123
For the first - Newton metre (for pressure I believe), nanometre, millimetre and megametre? Then state SI units to show the difference I guess

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I know what they are lol :tongue: I just don't know how to show the Newton metre derived in base units to compare the 4....
Original post by hamza772000
I know what they are lol :tongue: I just don't know how to show the Newton metre derived in base units to compare the 4....

Idk, tbh I'd just leave it as Newton metres:dontknow:
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Original post by Matrix123
Idk, tbh I'd just leave it as Newton metres:dontknow:
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No worries, I'll wait n see if someone else can help, thanks anyways :h:
Original post by hamza772000
No worries, I'll wait n see if someone else can help, thanks anyways :h:

OK no worries :smile:

But for the second one, wouldn't it just be kg/cubic metre?
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Original post by Matrix123
OK no worries :smile:

But for the second one, wouldn't it just be kg/cubic metre?
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Yeah, seems like it, how'd you get to that though? :smile:
Idk I googled it. This popped up.
https://www.conversion-metric.org/length/nanometer-to-meter
Reply 8
Avatar for Andy98
Andy98
20
Well hey there, the first unit is a Newton metre, the others are different multipliers of the Newton
Original post by saraxh
Nope, I googled it before making this thread, I'm just a little unclear :smile:
Original post by hamza772000
Yeah, seems like it, how'd you get to that though? :smile:

We did it in our lesson. If you look up the density formula, it's:
density=mass/volume
P=m/V
Kgm^-3 =Kg/m^3

Where P= Greek letter 'rho'

If that's what you're asking :tongue:
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(edited 7 years ago)
Reply 11
Avatar for Andy98
Andy98
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Original post by hamza772000
Yeah, seems like it, how'd you get to that though? :smile:


Right, so do you know what the 7 base units are?

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Original post by Andy98
Well hey there, the first unit is a Newton metre, the others are different multipliers of the Newton
Yes, I know that :smile: It just tells me to state the difference between them, should I just write their names? it's 3 marks and besides I can write the last 3 in base units(I think this form is also called that) i.e 1*10^-9 but how would I go about writing the first one? The Newton metre?
Reply 13
Avatar for Andy98
Andy98
20
Original post by Matrix123
We did it in our lesson. If you look up the density formula, it's:
density=mass/volume
P=m/V
Kgm^-3 =Kg/m^3

Where P= Greek letter 'rho'

If that's what you're asking :tongue:
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I was gonna go a different way altogether

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Original post by Andy98
I was gonna go a different way altogether

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Fair enough, I don’t really know where I'm going 100% tbh

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Original post by Matrix123
We did it in our lesson. If you look up the density formula, it's:
density=mass/volume
P=m/V
Kgm^-3 =Kg/m^3

Where P= Greek letter 'rho'

If that's what you're asking :tongue:
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Ah, I see thanks :smile: makes sense :smile:

Original post by Andy98
Right, so do you know what the 7 base units are?

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Indeed :smile:
Original post by hamza772000
Can someone please help me with these two questions, it's my homework :smile: The first question, I don't know much about the "Newton meter" and I don't get the second question, thanks in advance <3 :smile:




Sorry hamza I can't help I didn't do physics at A levels :redface:
Original post by hamza772000
Ah, I see thanks :smile: makes sense :smile:

Indeed :smile:


No worries Hamza :smile:

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Reply 18
Avatar for Andy98
Andy98
20
Original post by hamza772000
Yes, I know that :smile: It just tells me to state the difference between them, should I just write their names? it's 3 marks and besides I can write the last 3 in base units(I think this form is also called that) i.e 1*10^-9 but how would I go about writing the first one? The Newton metre?


That isn't a base unit, it's standard form, for base units think about your formulas. Which formulas involve Force?

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Original post by Andy98
That isn't a base unit, it's standard form, for base units think about your formulas. Which formulas involve Force?

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Oh, sorry my bad, my brain's dead at this hour :tongue:

I know force in base units= kgms^-2

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