How can you tell that a precipitate has formed?

if a solid appears when mixing two liquids

Explanation:

i remember this question :D

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a