You raise an apple to a higher position. The apple starts and ends at rest. The net work done on the apple is: [ ] positive [ ] negative [ ] zero The work done by you on the apple is: [ ] positive [ ] negative [ ] zero The work done by gravity on the apple is:

Sorting by the rock cycle

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.