Author Question: A string that is 0.15 m long and fixed at both ends is vibrating in its n = 5 harmonic. The sound ... (Read 69 times)

Deast7027 · **on:** Jul 29, 2018

A string that is 0.15 m long and fixed at both ends is vibrating in its n = 5 harmonic. The sound from this string excites a pipe that is long and open at both ends into its second overtone resonance.

What is the distance between a node and an adjacent antinode, in the string? The speed of sound in air is 345 m/s.
A) 7.5 mm B) 23 mm C) 150 mm D) 30 mm E) 15 mm

Question 2

If Planck's constant were ten times smaller than it is, quantum effects would be

A) easier to detect.
B) more difficult to detect.
C) neither easier nor more difficult to detect.