What do car manufacturers do to reduce the fluid friction acting on a car

The inner planets or call terrestrial because they

Part of a control linkage for an airplane consists of a rigid member cb and a flexible cable ab. if a force is applied to the end b of the member and causes it to rotate by θ = 0.5°, determine the normal strain in the cable. originally the cable is unstretched.

5. why should the electrons be placed separate from each other (why not together)?