An instrument this is used to measure the thickness of objects like a clipboard, wooden strip is under observation for a specific scenario. Instrument has a pitch of 0.7 mm and a circular scale with 77 divisions is used to measure the thickness of a thin sheet of plastic. Just before the experiment, it was observed that the two jaws of the instrument are brought in contact, the 75th division overlaps with the main scale line and that the zero of the main scale is barely visible. What is the thickness of the sheet if the main scale reading is 0.9 mm and the 39th division coincides with the main scale line?
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.
An instrument this is used to measure the thickness of objects like a clipboard, wooden strip is under observation for a specific scenario. Instrument has a pitch of 0.7 mm and a circular scale with 77 divisions is used to measure the thickness of a thin sheet of plastic. Just before the experiment, it was observed that the two jaws of the instrument are brought in contact, the 75th division overlaps with the main scale line and that the zero of the main scale is barely visible. What is the thickness of the sheet if the main scale reading is 0.9 mm and the 39th division coincides with the main scale line?
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