Q. What is the speed of a car going v = 1mph in SI units? Notice that you will need to change from miles to meters and from hours to seconds. You can do each conversion separately. Use the facts that 1 mile = 1609m and 1hour = 3600s.
Q. Two point charges, separated by 1.9 cm, have charge values of +2.5 and -4.3 μC, respectively. What is the value of the mutual force between them? (ke = 8.99 x 109 N m2/C2)