A copper rod is given a sharp compressional blow at one end. The sound of the blow, traveling through air at 0 ◦C, reaches the opposite end of the rod 6.4 ms later than the sound transmitted through the rod. What is the length of the rod? The speed of sound in copper is 0 ◦C: Vc= 3450 m / s The speed of sound in air at 0 ◦C: V= 331 m / s. Answer in units of m. A) 1.45 m B)1.75 m C) 2.19 m D) 5.1 m E) 2.33 m F) 2.5 m G) 2.75 m H) 1.85 m
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
A copper rod is given a sharp compressional
blow at one end. The sound of the blow,
traveling through air at 0 ◦C, reaches the
opposite end of the rod 6.4 ms later than the
sound transmitted through the rod.
What is the length of the rod?
The speed of sound in copper is 0 ◦C: Vc= 3450 m / s
The speed of sound in air at 0 ◦C: V= 331 m / s.
Answer
in units of m.
A) 1.45 m
B)1.75 m
C) 2.19 m
D) 5.1 m
E) 2.33 m
F) 2.5 m
G) 2.75 m
H) 1.85 m
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