'what is the temperature
of a piece of lead and
a piece of aluminum of
equal mass heated to 100°c
and submerged in equal amounts
of room temperature water in
seperated insulated cups?

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?