Answer:
The answer is B
Explanation:
It's past tense and dad is singular
It’s true there are sections in the periodic table that define the elements.
Answer:
There are four basic states of matter
Answer:
Explanation:
If a perfect vacuum existed in any volume, then no sound would be able to propagate through it, because a sound wave is a pressure wave, and there would be identically zero pressure. Of course, we could get into speculations about “dark energy” or “vacuum energy” supporting pressure waves, but let’s not go there.
