An electromagnetic field
A) is a region of space where a charge would feel a force.
B) can exist in vacuum.
C) Both of the above.
D) None of the above.
Question 2
The small piston of a hydraulic lift has a diameter of 8.0 cm, and its large piston has a diameter of 40 cm. The lift raises a load of 15,000 N.
(a) Determine the force that must be applied to the small piston.
(b) Determine the pressure applied to the fluid in the lift.