Take a turning fork and (a) strike it against the edge of a table. While it is v
ID: 1435049 • Letter: T
Question
Take a turning fork and (a) strike it against the edge of a table. While it is vibrating, touch the bottom end to a variety of surfaces. Explain what you hear. (b) Hold the fork close to your ear while it is vibrating and slowly rotate the tuning fork. Describe and explain what you hear . (d) In a piece of cardboard or construction paper, cut a strip out about half an inch wide and approximately the length of a tine of the tuning fork. Strike the tuning fork again and hold it near the hole in the cardboard. The sound becomes louder. Why? Take a turning fork and (a) strike it against the edge of a table. While it is vibrating, touch the bottom end to a variety of surfaces. Explain what you hear. (b) Hold the fork close to your ear while it is vibrating and slowly rotate the tuning fork. Describe and explain what you hear . (d) In a piece of cardboard or construction paper, cut a strip out about half an inch wide and approximately the length of a tine of the tuning fork. Strike the tuning fork again and hold it near the hole in the cardboard. The sound becomes louder. Why?Explanation / Answer
(a)A tuning fork serves as a useful illustration of how a vibrating object can produce sound. The fork consists of a handle and two tines. When the tuning fork is hit with a rubber hammer, the tines begin to vibrate. The back and forth vibration of the tines produce disturbances of surrounding air molecules. As a tine stretches outward from its usual position, it compresses surrounding air molecules into a small region of space; this creates a high pressure region next to the tine. As the tine then moves inward from its usual position, air surrounding the tine expands; this produces a low pressure region next to the tine. The high pressure regions are known as compressions and the low pressure regions are known as rarefactions. As the tines continue to vibrate, an alternating pattern of high and low pressure regions are created. These regions are transported through the surrounding air, carrying the sound signal from one location to another.Hence we hear sound with different frequency ranges as the material of the surface varies.
(b)A careful inspection of the particles of the air reveal that the air molecules are nudged rightward and then move back leftward to their original position. Air molecules are continuously vibrating back and forth about their original position. There is no net displacement of the air molecules. The molecules of air are only temporarily disturbed from their rest position; they always return to their original position. In this sense, a sound wave (like any wave) is a phenomenon which transports energy from one location to another without transporting matter.so when we turn slowly ,the sound is slowly reduced.
d)The sound becomes louder as fast vibrations create more sound.The waves try to pass through the hole fastly.The velocity of sound and length of air column are interlated to each other.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.