Which sound is most likely the most intense?
a whisper
a rock concert
normal speech
the sound of rain

A rock concert  

Explanation:

Sound intensity can be understood as the amount of power carried by acoustic waves per unit area. It is measured in dB or W/m². Loudness is related to sound intensity. With 10 times increase in intensity, loudness is doubled. Thus, most likely a rock concert would be most intense as it is the most loud from the given options. Least intense sound would be a whisper.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

answer; /// the above statement is (true);