The average mass of an automobile in the united states is about . the mass of a mosquito is 10 mg. the mass of an electron is use order-of-magnitude calculations to estimate how many times more massive both a mosquito and an automobile are when compared to an electron.

It's not possible to make any comparisons among those
three objects, since you've neglected to mention the masses
of two of them.  Several of the possible calculations would lead
to mathematical nightmares, involving divisions by zero.

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.