Two forces FA and FB are applied to an object whose mass is 10.4 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 0.503 m/s2. However, when FA points due east and FB points due west, the acceleration is 0.287 m/s2, due east. Find (a) the magnitude of FA and (b) the magnitude of FB.

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e