in which fo the following cases the centre of mass of a rod is certainly not at its centre?
(A) The density continuously increases from left ot right
(B) The density continuously decreases from left to right
(C) The density decreases from left to right up to the centre and then increases
(D) The density increases from left to right up to the centre and then decreases
Select correct alternative.

In which of the following cases, the centre of mass of rod may be its centre ? (1) The linear mass density increases continuously from left to right. (2) The linear mass density decreases continuouly from let to right. (3) The linear mass density decreases from left to right up to centre and then increases. (4) The linear mass density increases form left to right upto a certain point (may not be the centre) and the decreases from the point till the end.

In which case bond energy decreases from left to right ?

In which case the thermal conductivity increases from left to right.

In which case does the thermal conductivity increase from left to right