The frequency of vibrations of a vibrating violin string is given by = 2√ f= where L is the length of the string, T is its tension, and p is its linear density. (a) Find the rate of change of the frequency with respect to the following. (1) the length (when T and p are constant) (ii) the tension (when L and p are constant) (iii) the linear density (when L and T are constant) Answer options: , >, <, increasing, decreasing, lower, higher.
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.
Calc Q 35
![The frequency of vibrations of a vibrating violin string is given by
-√
f =
where L is the length of the string, T is its tension, and p is its linear density.+
(a) Find the rate of change of the frequency with respect to the following.
(i) the length (when T and p are constant)
(ii) the tension (when L and p are constant)
(iii) the linear density (when L and T are constant)
(b) The pitch of a note (how high or low the note sounds) is determined by the frequency f. (The higher the frequency, the higher the pitch.) Use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following.
(i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates
df ?0 and L is --Select--fis ---Select---
⇒---Select---
dL
(ii) when the tension is increased by turning a tuning peg
dT
?0 and T is --Select--fis --Select--- ♥ → ---Select---
Answer options: =, >, <, increasing, decreasing,
lower, higher.
(iii) when the linear density is increased by switching to another string
df
?0 and p is --Select--fis ---Select--- ✓ →---Select---
dp](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F188f89e3-b6e3-487b-b2ae-3e2285490b9c%2Fb1588c9a-3eb5-4c53-b199-87cab8306e8a%2Fcysihv_processed.jpeg&w=3840&q=75)
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