The electric field intensity at a particular location surrounding a Van de Graaff generator is 2.15E3 N/C. Determine the magnitude of the force that this field would exert upon a ball with 3.85E-7 C of charge when positioned at this location. Round to the appropriate number of sig figs, and put your answer in scientific notation

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.

The magnets are probably damaged or there not strong enough to attached to the refrigerator

I'd go for the one that says that knees are fulcrums, lower legs are levers and the ankles hold loads.hope it ,happy homework/ study/ exam!

Using renewable energy sources. just did the test and got it right.