Two friends made a magnet by wrapping a nail around a wire and connecting the wire to a battery. They each had different ideas about why the magnet worked. Which one do you agree with most?
Kathryn - I think the nail makes the magnet. If we pull the nail out, the magnet won't work anymore. O
Megan - I think it is the wire loops that make the magnet. If you take the nail away, it would still work. ​

Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.