Which of the following is not a principle of relative-age dating? a. sediments are deposited in lateral sheets. b. if one rock contains pieces of another, the pieces are older. c. if one geological feature cuts across another, the feature cutting across is older. d. in undisturbed rock layers, the oldest rocks are on the bottom.

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?