The battery on your car has a rating stated in ampere-hours that permits you to before discharge. Approximately how much energy is stored by a 50 A-hour 12-V battery?

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Am i correct on these two physics questions?