formulas=Density= mass/volume(D=M/V)
V=pieR^2H
a rectangular solid is 10.0 cm long, 8.1 cm wide, and 2.7 cm tall. the mass of the rectangular solid is 36.0 g. whats its density?
2007-06-29 05:19:01 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
V=pieR^2H is volume of a cylinder.
V =LWH is what you want here.
V= 10*8.1*2.7 = 218.7 cm^3
So Density = 36/218.7 = 0.16461 g/cm^3
2007-06-29 05:29:36 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
V = h(pi)r^2 works for a cylinder. This is rectangular. You find it's volume by V = L * W * H.
10 * 8.1 * 2.7 = 218.7 cc
D = M/V = 36 / 218.7 = 0.16 g/cc
2007-06-29 05:23:02 · answer #2 · answered by TychaBrahe 7 · 0⤊ 0⤋
=36/(10x8.1*2.7) g/cm^3
the volume you gave was based on a circular cross section.. the example is rectangular: l x w x h
2007-06-29 05:21:26 · answer #3 · answered by miggitymaggz 5 · 0⤊ 0⤋
It's 36.0g/(10.0 * 8.1 *2.7 cm^3) = 0.1646 g/cm^3
If I remember right there are 3 sig figs if you need those, so
0.165 g/cm^3
2007-06-29 05:23:02 · answer #4 · answered by pki15 4 · 0⤊ 0⤋
0.16460905 g/cm^3
2007-06-29 05:26:45 · answer #5 · answered by Zero 4 · 0⤊ 0⤋