Question

A sheet of metal is 2mm wide 10cm tall and 15cm long. it was 4g. what is the density?
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Answer 1

Ro = 133 [kg/m³]

Step-by-step explanation:

In order to solve this problem, we must apply the definition of density, which is defined as the relationship between mass and volume.

`Ro = m/V`

where:

m = mass [kg]

V = volume [m³]

We will convert the units of length to meters and the mass to kilograms.

L = 15 [cm] = 0.15 [m]

t = 2 [mm] = 0.002 [m]

w = 10 [cm] = 0.1 [m]

Now we can find the volume.

`V = 0.15*0.002*0.1\\V = 0.00003 [m^(3) ]`

And the mass m = 4 [gramm] = 0.004 [kg]

`Ro = 0.004/0.00003\\Ro = 133 [kg/m^(3)]`