20 points and giving out brainliest answers fast

which voice can produce a pitch that has a speed of 343 m/s and a wavelength of 0.68 m? check all that
a. bass
b. baritone
c. tenor
d. contralto
e. soprano

What challenges did you encounter during the circuit training program?

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?