A 4.0-m long pipe is closed at one end. Find the frequency of the second harmonic. The speed of sound is 340 m/s.
A)
170 Hz
B)
64 Hz
C)
85 Hz
D)
21 Hz
E)
57 Hz
Question 2
If the internal temperature of the sun is 15 x 106 K, what is the average kinetic energy of protons in this environment?
A)
0.040 eV
B)
1.3 keV
C)
1.9 keV
D)
1.3 MeV
E)
1.9 MeV