Class 7 Online Courses

Chapter 24: Class 7 Science Exam Tests

Class 7 Science MCQs - Chapter 24

Sound Waves Quiz Questions and Answers PDF - 19

The e-Book Sound waves Quiz Questions and Answers, sound waves Quiz Answers PDF, test 19 to study online class 7 science certificate courses. Download All Around Sounds MCQs PDF, sound waves quiz questions and answers to learn homeschool online courses. The Sound Waves Quiz App Download: Free learning app for all around sounds, vibrations and sound waves, musics and musical sound, frequency and pitch, sound and vacuum test prep for online classes.

The Quiz: Who discovered the 'Korotkoff' sounds; "Sound Waves" App Download iOS & Android (Free) with answers dr.nikolai korotkoff, isaac newton, michael faraday and thomas silva edison to learn homeschool online courses. Study all around sounds quiz questions, download Amazon eBook (Free Sample) for online school and college.

Sound Waves Questions & Answers PDF Download: MCQ Quiz 19

MCQ 91: Who discovered the 'Korotkoff' sounds?

A) Isaac Newton
B) Dr.Nikolai Korotkoff
C) Michael Faraday
D) Thomas Silva Edison

MCQ 92: The parts of sound waves where air pressure is lesser, is known as

A) compression
B) rarefaction
C) consolation
D) expansion

MCQ 93: The pleasant sound of music depends on its

A) amplitude
B) frequency
C) wavelength
D) volume

MCQ 94: The lowest level of frequency a human ear can detect, is

A) 2 Hz
B) 20 Hz
C) 20kHz
D) 2kHz

MCQ 95: We can hear the voice of alarm clock when there is

A) vacuum in the jar
B) air in the jar
C) liquid in the jar
D) space in the jar

Sound Waves Learning App & Free Study Apps

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Sound Waves App (Android & iOS)

Sound Waves App (Android & iOS)

7th Grade Science App (Android & iOS)

7th Grade Science App (Android & iOS)

Earth Science App (Android & iOS)

Earth Science App (Android & iOS)

8th Grade Science App (Android & iOS)

8th Grade Science App (Android & iOS)