- #1
Wa1337
- 33
- 0
Homework Statement
Density + Uncertainty of block?
The mass of a rectangular block is measured to be 2.2 kg with an uncertainty of 0.2 kg. The sides are measured to be 60 +/- 3mm, 50 +/- 1 mm, and 40 +/- 2mm. Find the density of the block in kilograms per cubic meter, giving the uncertainty in the result.
Homework Equations
D=m/V
The Attempt at a Solution
Mass = 2.2 +/- 0.2kg
Volume = 60mm x 50mm x 40mm = 120000mm3
then... 1/50 = .02, 3/60 = .05, 2/40 = .05 ---> sum = .12
120000mm3 x .12 = 14400
therefore V = 120000 +/- 14400mm^3 (Please help me convert this to cubic meters)
D=m/V
=2.2/120000 (really not supposed to use this until i get proper conversion)
= ?
Thanks