Question

4. Springs
Springs are made up of
a) copper
b) silver
c) wrought iron
d) aluminium​

Answer 1

Answer:

Springs are made from a variety of elastic materials, the most common being spring steel. Small springs can be wound from pre-hardened stock, while larger ones are made from annealed steel and hardened after fabrication.

Answer 2

Answer:

Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% ... tin in copper. Alpha bronze alloys of 4–5% tin are used to make coins, springs, turbines and blades.