Using dimensional analysis, derive the dimension of the following quantities: power, pressure, workdone, momentum

What object a collides with object b and bounces back its final momentum is?

What is a possible result of higher air temperature caused by global warming

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?