Give reasons (vii) Aluminium wire is used to make transmission cables.

Give reasons (v) Al alloys are used to make aircraft body

Give reasons (iii) Graphite is used as a lubricant

Aluminium is used for making utensils due to its.......

Give reasons (iv) Diamond is used as an abrasive

Give reasons (vi) Aluminium utensils cannot be kept in water overnight

Give reasons for the following: Graphite is used as a lubricant in machines.

Two wires of equal length, one of copper and the other of aluminium have the same resistance. Which of the two wires is lighter? Hence explain why aluminium wires are prefered for overhead power cables. (P_(Al) = 2.63 xx 10^(-8) Omega m , P_(Cu) = 1.72 xx 10^(-8) Omega m , Relative density of Al = 2.7 , of Cu = 8.9.

Give reasons (ii) A mixture of Al pieces and dilute NaOH is used to open drains