Landscape Fabric Roll
Physics Forums
by erobz
3h ago
I was trying to figure out how much landscape fabric I have left on a roll, given a known thickness ##T## of the fabric and the radius ##r## of that roll. I obviously don't want to do an integral to calculate it while I'm working, but was looking for some approximation that can be readily... Read more ..read more
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Conceptually understanding change in potential energy with 0 net work
Physics Forums
by DrBanana
3h ago
Suppose somehow an object is moving upwards with a speed ##v##, at this point I start applying a force ##F## that is equal to its weight, so the net force on the object is zero. So it will continue moving upwards with its initial speed. Suppose after the height difference is ##h##, I stop... Read more ..read more
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Determining how far a body will move up an inclined plane and the time to reach the highest point
Physics Forums
by tremain74
3h ago
15cos25 - 0.25N = ma ..read more
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Change fill-in color in PDF file with Adobe without Pro
Physics Forums
by nomadreid
3h ago
I don't have a color printer, so the standard blue used by Adobe for fillable forms don't come out well. Going to Edit>Text , Adobe gives me an ad to upgrade to Pro. Various internet sites tell me to go to form field settings or to Preferences, but I cannot find a path that will get me there. Is... Read more ..read more
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String theory and locality of small dimensions
Physics Forums
by marce
4h ago
- I have in essence never understood the concept of curled up dimensions in string theory ; in the sense that if it occurs in this universe isn't that included in our 3 dimensional space ? My question is more fundamental in the sense from a topology viewpoint : was it correct to involve curled... Read more ..read more
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Proof That an Integer is Divisible by 2
Physics Forums
by Math100
5h ago
Proof: Suppose ## N ## is the integer and ## x ## is the units digit of ## N ##. Then ## N=10k+x ## for some ## k\in\mathbb{Z} ## where ## x={0, 1, 2, 3, 4, 5, 6, 7, 8, 9} ##. Note that ## 10k\equiv 0\pmod {2}\implies N\equiv x\pmod {2} ##. Thus ## 2\mid N\implies N\equiv 0\pmod {2}\implies... Read more ..read more
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Parallel processing for loops and pointer defined outside the loop
Physics Forums
by mertcan
6h ago
Hi everyone; hope you are well. I have a small question: As far as I have searched, for example we can make integer variable defined outside the for loop private for multiple threads, but is it also possible to apply this situation for an integer pointer defined outside the for loop? I mean if a... Read more ..read more
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Mazen Dh. Mechanical engineer in infrastructure field
Physics Forums
by mazen
6h ago
Hope to participate in discussions and find answers about certain topics like anti water hammer design ..read more
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Does the voltage across a battery include its internal resistance?
Physics Forums
by laser
8h ago
I am uncertain if this represents situation (a) or situation (b). i.e. is 2 = E-iR or is 2 = E? Or is the question ambiguous? Thanks ..read more
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Change fill-in color in pdf adobe without Pro
Physics Forums
by nomadreid
9h ago
I don't have a color printer, so the standard blue used by Adobe for fillable forms don't come out well. Going to Edit>Text , Adobe gives me an ad to upgrade to Pro. Various internet sites tell me to go to form field settings or to Preferences, but I cannot find a path that will get me there. Is... Read more ..read more
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