As the of a sound wave increases,
the pitch of the sound gets lower.

What fits in the blank

the answer for apex is the lowest

number of electrons for neutral cl

it doesn't. it was imagined up in the middle ages.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.