If a car traveled 20km east and then 60 south. What is the distance and displacement?

When you turn on a battery-operated device, an electrical circuit is

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.

Name two kinds of practical electric pumps.