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Onlinelifeiswhatyoumake
Trance in my sig n blood
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Re: does anyone know physics or mechanical engineering? [Re: teamkiller]
    #18771979 - 08/29/13 06:41 AM (10 years, 5 months ago)

Quote:

does anyone know physics or mechanical engineering?




No.

I know computer science dough


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OfflineLord_McLovin
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Re: does anyone know physics or mechanical engineering? [Re: teamkiller]
    #18772186 - 08/29/13 09:06 AM (10 years, 5 months ago)

You understood it now or shall I explain it to you?


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Invisiblefiddle
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Re: does anyone know physics or mechanical engineering? [Re: Lord_McLovin]
    #18772409 - 08/29/13 10:30 AM (10 years, 5 months ago)

Explain the subscripts to me.
I like to know things.


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OfflineLord_McLovin
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Re: does anyone know physics or mechanical engineering? [Re: fiddle]
    #18772565 - 08/29/13 11:03 AM (10 years, 5 months ago)

Well, by definition pressure $p$ is force $F$ per area $A$. On sea level, you have a certain pressure $p_{ES}$ acting on the coffee coming from the espresso machine. However, you also have the ambient pressure $p_{AS}$ from the other side. Thus the total pressure acting on it is $\Delta p_S := p_{ES} - p _{AS}$. On the mountain you have a pressure of $\Delta p_M :=  p_{EM} - p _{AM}$ acting on the surface of the coffee.
You want the force to be the same, but the area is the same, so the pressure difference is also the same. Some arithmetics and that's it.


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Edited by Lord_McLovin (08/29/13 11:09 AM)


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Invisiblefiddle
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Re: does anyone know physics or mechanical engineering? [Re: Lord_McLovin]
    #18772621 - 08/29/13 11:15 AM (10 years, 5 months ago)

Ah, gotcha. I followed up until you switched from S & M to EM, ES, AM, AS, and then I couldn't figure out what you were trying to represent.


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