On which planet would a spaceship need the largest force to take off

In what direction does the medium move relative to the direction of the wave? explain.

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a. true or b. false