The table below gives some properties of three metals: Aluminium, iron and copper. Use it to answer the questions that follow.

      

The table below gives some properties of three metals: Aluminium, iron and copper. Use it to
answer the questions that follow.
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Assuming that steel and stainless steel have similar properties to iron.
(a) Why do some stainless steel sauce pans have a copper base?
(b) Aluminum with a steel core is used for overhead power cables in preference to
copper. Why is aluminum preferred ?
( c) Apart from over head power cables copper is chosen for almost all other electrical uses. Suggest two reasons fort he choice of copper.

  

Answers


sharon
(a) Copper has higher thermal conductivity than stainless steel.
(b) Since steel has higher tensile strength than aluminium hence greater resistance to
breaking.
(c) – It is less costly / cheaper
- Less high electrical conductivity
sharon kalunda answered the question on May 20, 2019 at 11:06


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