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7starmantis
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[SOLVED] Radius Problem
A brass rod (density = 8470 kg/m3) is 12cm long and weighs 20N. What is the radius of the rod?
I'm confused when finding area. I don't think I'm using the right variables.
volume = mass/density
v = 2.04 kg / 8470 kg/m3 = 2.4X10^-4
Area = volume/length?
A = 2.4X10^-4 / .12m = .002m
A = pi r^2
r = .03m
A brass rod (density = 8470 kg/m3) is 12cm long and weighs 20N. What is the radius of the rod?
I'm confused when finding area. I don't think I'm using the right variables.
volume = mass/density
v = 2.04 kg / 8470 kg/m3 = 2.4X10^-4
Area = volume/length?
A = 2.4X10^-4 / .12m = .002m
A = pi r^2
r = .03m