The answer is Density. The Density of the <span>glass is measured with bromoform and bromobenzene mixtures in a column. </span>Density measurement<span> is done using Density gradient </span>columns. It is a <span> temperature-controlled density </span>column<span> containing a </span>mixture<span> of b</span>romobenzene<span> and </span>bromoform.
<span>If the pitch of a sound increased, then the wave frequency increased. (D)</span>
Let north as positive
Fnet=10n-5n
=5n north