People's Education Edition Physics for Grade 8, Volume 2
People's Education Edition Physics for Grade 8, Volume 1
People's Education Edition Ninth Grade Physics Complete Book
Shanghai Science Edition Ninth Grade Physics
Shanghai Science Edition 8th Grade Physics
Lu Jiao Edition Ninth Grade Physics Volume 2
Beijing Normal University eighth grade physics volume one
Beijing Normal University Ninth Grade Physics Volume 1
Lu Ke Edition High School Physics Compulsory Course One
Lu Jiao Edition Ninth Grade Physics Volume 1
Guangdong and Shanghai Edition Ninth Grade Physics Volume 1
People's Education Press High School Physics Compulsory Course II
Beijing Normal University Ninth Grade Physics Volume 2
Lu Jiao Edition Eighth Grade Physics Volume 2
Lu Jiao edition eighth grade physics volume 1
Guangdong and Shanghai Edition Ninth Grade Physics Volume 2
Category | Format | Size |
---|---|---|
Shanghai Science Edition 8th Grade Physics | pptx | 6 MB |
Description
"Ultrasound and Infrasound" The World of Sound PPT Courseware 2
Review: The physical meaning, definition, unit, and calculation formula of frequency
Research has found that the frequency range of sound waves is 10-4 ~ 1012Hz
The frequency range of sound heard by normal human ears is 20 ~ 20000Hz
one. Ultrasound
1. Sound above 20000Hz
2.Application
①Ultrasound navigation capabilities
② Ultrasound has strong penetrating ability
Ultrasound diagnostic instrument (B-ultrasound)
Check and treat diseases
Ultrasonic metal flaw detector
Detect internal defects in metal
③ Ultrasonic has strong “breaking” ability
④Ultrasound and agriculture
Improve germination rate and shorten germination time
2. Infrasound
1. Sound below 20Hz
2. High-energy infrasound is harmful to machinery, buildings, and human bodies.
Keywords: The World of Sound teaching courseware, Ultrasound and Infrasound teaching courseware, Shanghai Science Edition eighth grade physics PPT courseware download, Eighth grade physics slide courseware download, The World of Sound PPT courseware download, Ultrasound and Infrasound PPT courseware download ,.PPT format;
For more information about the "The World of Sound Ultrasound and Infrasound" PPT courseware, please click the "The World of Sound ppt Ultrasound and Infrasound ppt" tag.
"Ultrasound and Infrasound" The World of Sound PPT Courseware 3:
"Ultrasound and Infrasound" The World of Sound PPT Courseware 3 [Experience] Try it and listen Activity 1: Use the same force to move different plastic rulers, as shown in Figure A. Move the 20cm long student ruler, as shown in Figure B Turn the 1m long plastic ruler. Activity 2: As shown in the figure, take a cylindrical shape..
"Ultrasound and Infrasound" The World of Sound PPT courseware:
"Ultrasound and Infrasound" The World of Sound PPT courseware Self-study text, answer questions 1. What is the frequency range of sound waves? 10-4~1012Hz 2. What is the frequency range of sound heard by normal human ears? 20 ~ 20000Hz 3. What is the highest frequency of sound that dogs can hear...
File Info
Update Time: 2024-11-13
This template belongs to Physics courseware Shanghai Science Edition 8th Grade Physics industry PPT template
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