Two speakers pointing in the same direction are set up to produce pure tones of 160 Hz and 166 Hz. When both are tuned in, with
what frequency will one hear a fluctuating intensity?

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!