Dr. Flores received the below post on the space forum and needs your help responding. First, read the post and consider any initial ideas on how to respond. Type your thinking below. *

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force

Three resistors are connected in series across a 15-v power supply. if the potential drops across resistors 1 and 2 are 4.1 volts and 3.1 volts, what is the exact potential drop (in volts) across resistor 3?

Aproton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?