Bob has two tubes that both support (or hold) standing sound waves with the same frequency. Tube A has two open ends, and Tube B has one open end and one closed end. The value of the fundamental frequency for both tubes is the same.

(a) How many wavelengths long is Tube A for the fundamental mode (or frequency)?

(b) How many (of the same) wavelengths long is Tube B for the fundamental mode (or frequency)?

a) tube A's length is half the wavelength

b) tube B's length is three fourth of the wavelenght.

Explanation: for a pipe with both ends open, antinodes form at both ends and a node forms in the midpoint of the tube.

For a pipe with one end open, a node forms at the closed end and an antinode at the Open end.

answer; a. neither end of earth's axis is tilted toward or away from the sun .is your correct answer;

newton's first law of motion