Answer:
[tex]Length = 25cm[/tex]
Step-by-step explanation:
Given
Brass Shape: Square
[tex]Density = 4.2g/cm^3[/tex]
[tex]Mass = 1.05kg[/tex]
[tex]Height = 4mm[/tex]
Required
Determine the length of the plate
First, we need to calculate the Volume of the Brass using
[tex]Density = \frac{Mass}{Volume}[/tex]
Make Volume the subject of formula
[tex]Volume = \frac{Mass}{Density}[/tex]
Substitute 1.05kg for Mass and 4.2g/cm³ for Density
[tex]Volume = \frac{1,05\ kg}{4.2\ g/cm^3}[/tex]
Convert 1.05 kg to grams
[tex]Volume = \frac{1.05 * 1000\ kg}{4.2\ g/cm^3}[/tex]
[tex]Volume = \frac{1050 \ kg}{4.2\ g/cm^3}[/tex]
[tex]Volume = \frac{1050 \ kg}{4.2\ g/cm^3}[/tex]
[tex]Volume = 250cm^3[/tex]
Next is to determine the Area of the brass;
[tex]Volume = Height * Area[/tex]
Substitute 250cm³ for Volume and 4mm for Height
[tex]250cm^3 = 4mm * Area[/tex]
Convert mm to cm
[tex]250cm^3 = 4 * 0.1cm * Area[/tex]
[tex]250cm^3 = 0.4cm * Area[/tex]
Divide both sides by 0.4cm
[tex]\frac{250cm^3}{0.4cm} = \frac{0.4cm * Area}{0.4cm}[/tex]
[tex]\frac{250cm^3}{0.4cm} =Area[/tex]
[tex]625cm^2 = Area[/tex]
[tex]Area = 625cm^2[/tex]
Lastly, we'll calculate the length of the brass
Since the brass is square based;
[tex]Area = Length^2[/tex]
Substitute 625cm² for Area
[tex]625cm^2 = Length^2[/tex]
Take square root of both sides
[tex]\sqrt{625cm^2} = Length[/tex]
[tex]25cm = Length[/tex]
[tex]Length = 25cm[/tex]
Hence, the length of the square brass is 25cm
