Question

Physics question on volume and weight?

A certain part of an aircraft engine has a volume of 1.6 ft^3.
(a) Find the weight of the piece when it is made of silver.
____ lb

(b) If the same piece is made of aluminum, what is its weight?
____ lb

Determine how much weight is saved by using aluminum instead of silver.
____ lb

Answer 1

We using the equation of the density
ρ=m/V
Therefore, we get weight materials
m=ρV
(a) Silver density is 655 lb/ft3
m=655 lb/〖ft〗^3 ×1.6〖 ft〗^3
m=1048 lb silver
(b) Aluminum density is 169 lb/ft3
m=169 lb/〖ft〗^3 ×1.6〖 ft〗^3
m=270 lb aluminum
(c)
Saved=1048 lb-270 lb
Saved=778 lb