Suppose a car is being driven forward by a force of 2600 N. The car also is dragging something by a rope which exerts a tension force of 400 N. If the car's
mass is 900 kg, what is the car's acceleration?

An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 26 mm and 103 mm. the electric potential of the inner conductor with respect to the outer conductor is - 700 v (k = 1/4πε 0 = 8.99 × 109 n · m2/c2) the energy stored in a 1.0-m length of this capacitor is closest to