Sound Continued
Gbogbo ọrọ náà
Thunder rolls in seconds after the lightning flash, a shout returns as an echo from a cliff, and an unborn baby is imaged with sound too high-pitched to hear. Sound is a wave that travels through matter, and by timing it, reflecting it and pushing its frequency above hearing we can measure distances, find flaws and see inside the body.
In this lesson you will measure the speed of sound in air from a distance and a time, describe how amplitude and frequency set the loudness and pitch of a note, define an echo and ultrasound, and use ultrasound in sonar and scanning, including calculating depth or distance from the travel time and the wave speed.
Ebumnobi
- Describe a method involving a measurement of distance and time for determining the speed of sound in air
- Describe how changes in amplitude and frequency affect the loudness and pitch of sound waves
- Describe an echo as the reflection of sound waves
- Define ultrasound as sound with a frequency higher than 20 kHz
- [Supplement] Describe the uses of ultrasound in non- destructive testing of materials, medical scanning of soft tissue and sonar including calculation of depth or distance from time and wave speed
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Sound Continued. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- The approximate speed of sound in air is A. 3 m/s B. 34 m/s C. 340 m/s D. 3 x 10^8 m/s Answer: C
- Increasing the amplitude of a sound wave increases its A. pitch B. frequency C. loudness D. speed Answer: C
- Ultrasound is defined as sound with a frequency higher than A. 20 Hz B. 200 Hz C. 2 kHz D. 20 kHz Answer: D
- An echo returns from a wall 1.0 s after a clap. The wall is 170 m away. The speed of sound is A. 85 m/s B. 170 m/s C. 340 m/s D. 680 m/s Answer: C
- A sonar pulse takes 0.4 s to return from the seabed (speed 1500 m/s). The depth is A. 150 m B. 300 m C. 600 m D. 1200 m Answer: B
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Sound Continued? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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