- #1
Minihoudini
- 28
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Homework Statement
The standard kilogram is a platinum-iridium cylinder 39.0 mm in height and 39.0 mm in diameter. What is the density of the material?
Homework Equations
now I know that to find volume you have to use v=h(pi)r^2
and I also know you have to convert it to meters. When I do I get this
(0.039)(pi)(0.0195)^2
which gives me 4.6589033654573236278091385713189e-5
so this is what I get over all
1 / (39.0 * pi * (19.5^2)) = 2.14642786 × 10-5
yet the answer is 2.15*10^4k/m^3
can someone tell me what I am doing wrong, and if I am suppose to convert the 2.14