Question

we can wrire with pen on our hand,but why we cannot write wuth a pencil on our hand???

Answer 1

because ink being liquid pass through uor cell but the solid particles of pencil lead cannot pass

Answer 2

We can wrire with pen on our hand,but  we cannot write with a pencil on our hand

as the ink containing in pen pen is a liquid and liquid  can flow easily

whereas the lead present in pencil i s solid and it do not flow