A train is travelling at 40 km/hr in a west direction near a road along which a
car moves at 60 kml hr at an angle of 30degree west
of north find the direction and the speed of
car as it appears to a man in the train.

You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, what happens to the following quantities?