Sealed Tube
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A 15.0-cm long cylindrical glass tube, sealed at one end, is filled with ethanol.?
A 15.0-cm long cylindrical glass tube, sealed at one end, is filled with ethanol.
The density of ethanol is 0.789 g/ml. Calculate the inner diameter of the tube in centimeters.
solution pls..
this is the missing given
The mass of ethanol needed to fill the tube is found to be 11.86 g.
Density = mass/ volum
therefore volume of ethanol required = mass/ density = 11.86 / 0.789 = 15 ml
15 ml = 15 cm3 (cm cube)
Volume (V) = A (cross sectional area) X h (height )
A = 3.142 X r sq. ( r is radius of glass tube)
3.142 x r sq = V/h
r = sq root of ( V/ (h X 3.142 ))
= sq root of ( 15 / (15 x 3.142))
= sq root of ( 0.318)
= 0.5
diameter = 2r = 0.5 x 2 = 1 cm
method is correct, but not sure abt calculations
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