2. Sasha used the volume control on her TV to make the sound louder or
softer. Which property of waves is Sasha's volume control changing?!
point
O amplitude
O wave period
wavelength
O wave speed
nanewer the following questions.

amplitude

Amplitude

Explanation:

Amplitude is the peak to peak width of the sound wave. An increase in volume widens the amplitude.

C. 12 × 16

Explanation:

Let mH be the mass of atoms of hydrogen and mO be the mass of atoms of oxygen.  The atoms of oxygen have 16 times the mass of atoms of hydrogen. That is,

mO = 16 mH   [1]

Let mX be the mass of the atoms of X. Atoms of element X have 12 times the mass of atoms of oxygen. That is,

mX = 12 mO   [2]

If we substitute [1] in [2], we get

mX = 12 × 16 mH

If mH is 1, we get,

mX = 12 × 16 × 1

mX = 12 × 16