8. On what basis do we choose a material to make an object?

1.	8. On what basis do we choose a material to make an object?
Answer» <p>- cost e.g. stainless steel might be better than normal steel for a certain product but it is more expensive. </p><p>- the physical properties of the material e.g. you might need a low density high tensile strength material for an aircraft wing </p><p>- the chemical properties of the material e.g . you wouldn't make a acid-storage container out of iron because iron reacts with acid </p><p>- its availability e.g. you might want an exotic hardwood for furniture but it is scarce </p><p>- how easy it is to work with e.g. skilled workers might be needed for stainless steel welding, so you might choose not to use stainless steel for a product because you know you can't get the skilled staff required</p>

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