(1) A rectangular metal block with mass 18 kg has
dimensions 0.1 m X0.15 m +0.2 m. Calculate the volume
of the block and thus its density.

Volume=0.003m^3

Density=6000kg/m^3

Explanation:

mass =18kg

Volume of block=length x width x height

Volume of block=0.1x0.15x0.2

Volume of block=0.003m^3

Density=mass ➗ volume

Density=18 ➗ 0.003

Density=6000kg/m^3

c. magnitude and direction

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach