/sci/ - STEM

Need maffs help please Anonymous 20/07/28(Tue)15:45 No. 16969 ID: 1c4573

File 159594390335.jpg - (404.94KB , 2000x1333 , blue-bog-oak-table.jpg )

I am making a table with hexagons spaced 3/16th of an inch apart filled with epoxy. The table is approx. 30" deep and 6' long. I need to know the volume of epoxy required to pour 1/4" thick for this table.

Anonymous 20/07/28(Tue)23:58 No. 16970 ID: 9e8c2a

File 159597351372.png - (17.32KB , 837x538 , table diagram.png )

>>16969
i need a little more information, anon. what is the length of the gap? and what is the side length of a single hexagon?

if you can find those out, you can solve for the volume needed using pic related and the formulas below.

Area_Of_Hexagon_Including_Gap = 3sqrt(3) * Gap_Length^2 / 2

Area_Of_Gap = Area_Of_Hexagon_Including_Gap - [ 3sqrt(3) * Side_Length / 2 ]

Area_Of_Table = Length_Of_Table * Width_Of_Table

Number_Of_Hexagons = Area_Of_Table / Area_Of_Hexagons_Including_Gap

Volume_Of_Epoxy_Needed = Area_Of_Gap * Height_Of_Table * Number_Of_Hexagons

Anonymous 20/07/29(Wed)00:00 No. 16971 ID: 9e8c2a

>>16970
minor typo.
Area_Of_Gap = Area_Of_Hexagon_Including_Gap - [ 3sqrt(3) * Side_Length^2 / 2 ]

Anonymous 20/07/29(Wed)00:36 No. 16973 ID: 9e8c2a

>>16969
by the way, if you end up doing the calculations yourself, make sure all your measurements are in inches. that way, you can use the calculator below to find your answer in fluid ounces.
https://www.metric-conversions.org/volume/cubic-inches-to-us-ounces.htm

Anonymous 20/07/29(Wed)01:30 No. 16974 ID: 9e8c2a

>>16969
to get the volume of epoxy to get a 1/4" thick layer on top of the hexagons: [ Volume_Of_Epoxy_Needed + (Area_Of_Table * 1/4) ].

Anonymous 20/12/09(Wed)03:36 No. 17101 ID: 74097f

Why not cover it with plastic. Pour water in to the depth you need. Pour the water into a measuring cup and maybe add a little more for the wetted volume on the water not in the measuring cup. Fast, cheap accurate.

Anonymous 20/12/29(Tue)22:01 No. 17181 ID: 6cedb9

Bumpers.

Anonymous 20/12/31(Thu)20:40 No. 17183 ID: 677189

volume = height * (length*width - nHexagons * areaOfASingleHexagon)

The area of a hexagon is 3*sqrt(3)/2*a^2, where a is the length of one side.

But really you're going to make too much epoxy, so just get it close and then add a little more to be safe. I'm guessing you've done this before, but if you don't degas your epoxy before you pour it, you're not going to get the results you want.

>>16973
Why the everloving fuck would you subject anyone to the imperial system and then use a conversion calculator when he can measure in centimeters and then end up with volume in cubic centimeters, which is already equal to the volume in mL by definition?

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