1. Convert the dimensions of the sheet to inches:
   • Länge: 4 Füße = 48 Zoll
   • Breite: 8 Füße = 96 Zoll
2. Convert the thickness to decimal form:
   • 3/16 inch = 0.1875 Zoll
3. Calculate the area of the sheet in square inches:
   • Fläche = Länge x Breite = 48 inches x 96 inches = 4,608 square inches
4. Calculate the volume of the sheet in cubic inches:
   • Volumen = Fläche x Dicke = 4,608 square inches x 0.1875 inches = 864 Kubikzoll
5. Convert the volume from cubic inches to cubic feet:
   • Volumen (Kubikfuß) = Volume (Kubikzoll) / 1728 = 864 Kubikzoll / 1728 = 0.5 Kubikfuß
6. Determine the density of aluminum. The density of aluminum is typically around 0.098 Pfund pro Kubikzoll.
7. Multiply the volume in cubic feet by the density to calculate the weight in pounds:
   • Gewicht (Pfund) = Volume (Kubikfuß) x Density = 0.5 Kubikfuß x 0.098 lbs/in³ ≈ 0.049 Pfund

daher, eine 4×8 3/16 Aluminiumblech would weigh approximately 0.049 Pfund.