Will an object with a density of 1.05 g/ml sink or float in water

It will only float in unusually salty water, like from the Great Salt Lake or the Dead Sea. 1.05 is greater than the density of any other water, like drinking water or ocean water, so the object will sink in those.

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.