A man unloads a 4.0-kg box from a moving van by giving it an initial speed of 1.1 m/s down a ramp that makes an angle of 18° with the horizontal. It slides with negligible friction for 2.3 m along the ramp before reaching the man's helper. What is the speed of the box as the helper catches it?

You and a friend (alex) are at a a tree-top adventure park .. . part of the course requires you to climb up a rope. you both climb the same rope in the same amount of time. however, the tension in the rope is greater when alex climbs. who did the most work? alex did - more tension means more force - more force means more work was done you did - less tension means less force - less force means more work was done to find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? when more work was done, the couch was moved less. when more work was done, the couch was moved further. when more work was done, the couch wasn't moved at all. when more work was done, the couch was moved the same distance.

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?