result b to get credit. Turning this prelab gus getting any credit for the prela

Question

result b to get credit. Turning this prelab gus getting any credit for the prelab. in not was measured with a caliper to be 3238 em and the mass of the cube is 91.66 g a) How many significant figures you get when you read with this caliper? b) Calculate the volume of the cube in m2. Specify the number of the significant figures. c) What is the density of the cube in kg/m. Show your work. How many significant figures you should have in your answer? 2. What mass (in grams) should a cube have to be made of copper (copper density 8990 kg/m) if the length of the cube is 1 inch? Show your work to get credit.

Explanation / Answer

Given

length of the cube is l = 3.238 cm , mass is m = 91.66 g

l = 3.238 cm , three significant figures , m = 91.66 g two significant figures

b) volume of the cube , v with length l is  

V = l^3 = (3.238*10^-2)^3 m^3 = 3.39493*10^-5 m^3

five significant fugures

c) density of the cube is d = m/V

d = (91.66*10^-3)/3.39493*10^-5 kg /m^3  

d = 2699.9084 kg /m^3

four significant figures

2) cube made up of copper with density is d = 8990 kg/m^3

length of the cube is l = 1 inch

mass m =?

density is d = m/V

1 inch = 0.0254 m

m = d*V = 8990*(0.0254)^3 kg

m = 0.14731971 kg

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