1. A Cube\'s length was measured with a caliper to be 3.238cm and the mass of th

Question

1. A Cube's length was measured with a caliper to be 3.238cm and the mass of the cube is 91.66g.

A) How many significant figures you get when you read with this caliper?

B) Calculate the volume of the cube in m^3. Specify the number of the significant figures.

C) What is the density of the cube in kg/m^3. How many significant figures you should have in your answer?

2. What mass (in grams) should a cube have to be made of copper (density of copper = 8990 Kg/m^3) if the length of the cube is 1 inch.



Please show working out so that I can solve these in the fututre, thank you.

Explanation / Answer

here,

part A: 2 sig figures (answer)

part B: Volume V = l^3

V = 0.0328^3

V = 3.52 *10^-5 m^3 (answer)

-----------------------------

part C:

density D = mass/Volume

D = 0.09166/(3.52 e -5)

D = 2604 kg/m^3 (answer)
--------------------------------

mass = DV

1 in = 0.0254 m

mass of copper = 8990 * (0.0254^3)

mass of copper = 0.14731 kgs

or mass m = 147.31 gms (answer)

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