Physics, 21.01.2020 22:31 macybarham

Astructural steel has an allowable stress of 21,600 psi. express this in pascal and mpa.

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To solve this problem we will apply the conversion concepts given for the available units. Recall that the unit 'psi' is the expression equivalent to pounds per square inch applied on a surface. The force pounds in Newtons (mass per acceleration) are equivalent to

1lb = 0.45kg*9.8m/s^2

While square inches to square meters are equivalent to

1 in^2 = 0.00064516m^2

Making the conversion for the elimination of the units we would have

$\sigma = 21600psi$

$\sigma = 21600\frac{lb}{in^2}$

$\sigma = 21600\frac{lb}{in^2}(\frac{0.45kg*9.8m/s^2}{1lb})(\frac{1in^2}{0.00064516m^2 })$

$\Rightarrow \therefore \mathbf{\sigma = 147647095.3Pa}$

$\Rightarrow \therefore \mathbf{\sigma = 147.64Mpa}$

Answer from: Quest

Acetic acid /əˈsiːtɪk/, systematically named ethanoic acid /ˌɛθəˈnoʊɪk/, is a colourless liquid organic compound with the chemical formula ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called glacial acetic acid. vinegar is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to polyvinyl acetate and cellulose acetate. it is classified as a weak acid since it only partially dissociates in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7 3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366 chemblchembl539 chemspider171 drugbankdb03166 echa infocard100.000.528ec number200-580-7e numbere260 (preservatives)gmelin reference1380iuphar/bps1058keggd00010 meshacetic+acidpubchem cid176rtecs numberaf1225000uniiq40q9n063p un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4) key: qtbsbxvteameqo-uhfffaoysa-n smilescc(o)=o

Answer from: Quest

2. they have negligible mass.

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Astructural steel has an allowable stress of 21,600 psi. express this in pascal and mpa....

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