12. The resistivities of copper and aluminium are 1.7
x 10-80 m and 2.6 X 10-80 Ωm
respectively. What will be the diameter of a
copper wire which would have the same
resistance and equal length as that of the
aluminium wire of diameter 1.5 mm?​

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

The dot diagram represents the motion of the motorcycle as it moves from left to right

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.