다음 중 주파수가 가장 낮을 것 같은 목소리는?
■baby girl
□baby boy
■a man
□a woman

You will be shocked to know but the voice which has the lowest frequency is A man's voice

The frequency depends upon pitch. A man's voice has the lower pitch than the rest.As pitch of man's voice is low and we know that pitch is proportional to frequency of a sound, The man's voice is of minimum frequency as compared with others.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Iwould sure like to answer your question but i honestly just don’t know