A tuning fork vibrates at a frequency of 570 Hz and is held in the air above an open tube at both ends. The first resonance occurs when the tube length is 29 cm. Caucule the speed of sound in the air.

answer; /// i believe that the correct answer is (c)

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!

i believe the answer is a hope it and is correct