Posted by **De Angelis ** on Sunday, February 27, 2011 at 8:07pm.

A rectangular sheet of

aluminum foil is 50 centimeters long and 20 centimeters

wide, and weighs 5.4 grams. Find the thickness

of the aluminum foil in centimeters.

- algebra -
**eb**, Tuesday, April 12, 2011 at 1:30am
D = kg/V = 2700kg/m^3.

5.4*10^-3 / V = 2700,

V = 5.4*10^-3 / 2.7*10^3 = 2*10^-6.

V = 0.05 * 0.02 * T = 2*10^-6,

1*10^-3*T = 2*10^-6,

T = 2*10^-6 / 1*10^-3 = 2*10^-3m = 2mm.

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