Author Question: A platinum wire that is 1.20 m long has a radius of 0.500 mm and is fixed at both ends. In its third ... (Read 85 times)

newyorker26 · **on:** Jul 29, 2018

A platinum wire that is 1.20 m long has a radius of 0.500 mm and is fixed at both ends. In its third harmonic it vibrates at 512 Hz. The density of platinum is 21.4 103 kg/m3. What is the tension in the wire?

A) 4.00 kN
B) 2.00 kN
C) 2.82 kN
D) 1.41 kN
E) 1.00 kN

Question 2

A 2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kN. What is the frequency of the fundamental mode of vibration of this wire?

A) 204 Hz
B) 102 Hz
C) 408 Hz
D) 510 Hz
E) 153 Hz