What are some questions about sound?
Sound waves test questions
- Which waves are fastest? Light.
- What type of waves are sound waves? Water.
- What part of the ear collects sounds?
- What is the diaphragm in a telephone most like?
- What is the amplitude of a wave?
- What is the wavelength of a wave?
- What is the frequency of a wave?
- In which does sound travel fastest?
What is sound class 9th answer?
Answer: Sound is mechanical energy which produces a sensation of hearing. When an Object is set into vibrations, sound is produced. Question 3. Cite an experiment to show that sound needs a material medium for its propagation.
Why can we hear class 9?
The energy of vibrating tuning fork travels outward. This energy which reaches the ears, makes the eardrums to vibrate and thus we hear sound.
What is sound STD 9th?
Sound is a kind of a longitudinal and mechanical wave. That means, in sound, the particles vibrate to and fro consisting of compressions and rarefaction and it is a mechanical wave (needs a medium to travel). Frequency: It is the number of sound waves produced per second (Hertz). It is denoted by υ(nu).
How is sound produced?
Sound is a type of energy made by vibrations. When an object vibrates, it causes movement in surrounding air molecules. These molecules bump into the molecules close to them, causing them to vibrate as well. This “chain reaction” movement, called sound waves, keeps going until the molecules run out of energy.
What type of wave is sound?
These particle-to-particle, mechanical vibrations of sound conductance qualify sound waves as mechanical waves. Sound energy, or energy associated with the vibrations created by a vibrating source, requires a medium to travel, which makes sound energy a mechanical wave.
What is Sonar class 9th?
Sonar stands for Sound Navigation And Ranging. It is a device which is used to find distance, direction and speed of underwater objects like, water hills, valleys, icebergs, submarines, sunken ships etc.
What is rarefaction Class 9?
When a vibrating object moves backward in air as medium, it creates a region of low pressure. This region is called a rarefaction.
Why can we hear 2 marks?
The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These cues are: (1) which ear the sound hits first (known as interaural time differences), and (2) how loud the sound is when it reaches each ear (known as interaural intensity differences).
What is a wave Class 9?
A wave is a disturbance in a medium that carries energy without a net movement of particles. It may take the form of elastic deformation, a variation of pressure, electric or magnetic intensity, electric potential, or temperature.
What are the 3 types of sound?
Sound waves fall into three categories: longitudinal waves, mechanical waves, and pressure waves.
What are the five sources of sound?
Acoustic instruments, Electrical instruments, Living beings like animals and birds using their vocal cords, Man-made sources like machines, any vibration caused by wind are five sources of sound.
What are MCQ questions for Class 9 Science Chapter 12 sound?
You can refer to NCERT Solutions for Class 9 Science Chapter 12 Sound to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. Question 1. Question 2. A key of a mechanical piano struck gently and then struck again but mush harder this time.
Where can I take the physics basics of sound quiz?
Physics: Basics of Sound. For webquest or practice, print a copy of this quiz at the Physics: Basics of Sound webquest print page. About this quiz: All the questions on this quiz are based on information that can be found at Physics: Basics of Sound .
Is there a sound vibrations lesson for kids?
If you would like to hear more about this topic, you can do so by using the lesson called Sound Vibrations: Lesson for Kids. Things discussed in this lesson include:
Which is the best chapter of NCERT solutions class 9?
The students are advised to go through the NCERT Solutions Class 9 for self-evaluation after having studied each chapter. They will thereby get to know their shortcomings and do their best to overcome them before the examinations. 1. How does the sound produced by a vibrating object in a medium reach your ear?