The position of an object is given by x = at^3-bt^2+ct, where a = 4.1 m/s^3, b = 2.2 m/s^2, c = 1.7 m/s, and x and t are in Si units. What is the instantaneous acceleration of the object when t = 0.7 s?

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?