MathDB

3

Part of 2008 National Chemistry Olympiad

Problems(1)

2008 USNCO Local #3: Thickness of aluminum foil

Source:

12/3/2012
A student wishes to determine the thickness of a rectangular piece of aluminum foil but cannot measure it directly. She can measure its density (d)(d), length (l)(l), mass (m)(m) and width (w)(w). Which relationship will give the thickness?
<spanclass=′latex−bold′>(A)</span>md⋅l⋅w<spanclass=′latex−bold′>(B)</span>m⋅l⋅wd<spanclass=′latex−bold′>(C)</span>d⋅l⋅wm<spanclass=′latex−bold′>(D)</span>d⋅ml⋅w<span class='latex-bold'>(A)</span>\hspace{.05in}\frac{m}{d \cdot l \cdot w} \qquad<span class='latex-bold'>(B)</span>\hspace{.05in}\frac{m \cdot l \cdot w}{d} \qquad<span class='latex-bold'>(C)</span>\hspace{.05in}\frac{d \cdot l \cdot w}{m} \qquad<span class='latex-bold'>(D)</span>\hspace{.05in}\frac{d \cdot m }{l \cdot w} \qquad