An investigation involves determining which metal is better for making pots that will cook food faster. which is the best hypothesis to use for this investigation?

Because the specific metals aren’t mentioned in this inquiry. The educational guesses that we can propose is that:
1.    The hypothetical inquiry: There are existing metals for making pots that will cook food much faster.

2.    The one-tailed alternative hypothesis: There are other metals for making pots that will cook food much faster than the other metals.
3.    The one-tailed null hypothesis: All metals that are used in making pots will cook food at an equal rate.

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.