2n3055 is a metal package (to3) tip3055 plastic package (to220) so metal package more heat capacity
A: That is a packaging standard of the part. TO3 ,TO18 all refers to packaging standard that manufacturers use to make their part to conform to a standard.
0.5
What??
0.15
4
6 to 1
sometimes
4:3 is equivalent to 42
9:00 to3:00
That will depend on the question which has not been given.
one hour