World's only instant tutoring platform
dropdown-logo
Instant TutoringAbout Us
Login
App StorePlay Store
Question 54: A sound signal of 128 vibrations per second has a
Physics by Lakhmir Singh
Physics

Class 9

Lakhmir Singh

Author:
Lakhmir Singh
Publisher:
S. Chand
Subject:
Science
Question

Question 54: A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.

Views

Views: 6,069 students

Updated on: Mar 23, 2023

Book

Book:

Physics (Lakhmir Singh)

Text SolutionText solutionverified iconVerified

Answer: We have to find the velocity of the sound wave.
Frequency is number of vibrations produced per second.
Given: Frequency f = 128 Hz
Wavelength λ = 2.7 m
We know the relation between velocity, frequency, and wavelength ν = f × λ,
where ν is the velocity, f the frequency, and λ the wavelength.
So,
ν = (128) × (2.7) m/s
   = 345.6 m/s
Therefore, velocity of sound is 346 m/s .
Was this solution helpful?
48
Share
Report
Video Solution

Video solutions (1)

Learn from their 1-to-1 discussion with Filo tutors.

filo Logo
9 mins

Uploaded on: 3/23/2023

Ask your question, on a video call with tutor

Connect instantly with this tutor

Connect now

Taught by

tutor profile picture
Surendra Kumar Meena

Total classes on Filo by this tutor - 14,330

Teaches : Mathematics, Social Studies (SST)

Connect instantly with this tutor

Connect now

Notes from this class (3 pages)

Arrow
Download
Arrow
Arrow
Arrow
Was this solution helpful?
130
Share
Report
tutor 0tutor 1tutor 2
Found 2 tutors discussing this question
Charlotte Discussed
Question 54: A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.
8 mins ago
Discuss this question LIVE
8 mins ago
One destination for complete JEE/NEET preparation
One destination to cover all your homework and assignment needs
Learn Practice Revision Succeed
Instant 1:1 help, 24x7
Instant 1:1 help, 24x7
60, 000+ Expert tutors
60, 000+ Expert tutors
Textbook solutions
Textbook solutions
Big idea maths, McGraw-Hill Education etc
Big idea maths, McGraw-Hill Education etc
Essay review
Essay review
Get expert feedback on your essay
Get expert feedback on your essay
Schedule classes
Schedule classes
High dosage tutoring from Dedicated 3 experts
High dosage tutoring from Dedicated 3 experts
Trusted by 4 million+ students

Practice more questions from Physics (Lakhmir Singh)

Q1
Question 53: When we open a gas tap of a few seconds, the sound of escaping gas is heard first but the smell of gas comes later. Why?
Q2
Question 54: A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.
Q3
Question 55: A wave is moving in air with a velocity of 340 m/s. Calculate the wavelength if its frequency is 512 vibrations/sec.
View all

Practice questions from Physics (Lakhmir Singh)

Question 1
Views

Views: 5,904

Question 49: If a ringing bicycle bell is held tightly by hand, it stops producing sound. Why?
Topic

Topic:

Sound

Book

Book:

Physics (Lakhmir Singh)

View solution

Question 2
Views

Views: 6,076

Question 24: State the general name of the waves in which the particles of the medium vibrate :

(i) in the same direction as wave.
(ii) at right angles to the direction of wave.
Topic

Topic:

Sound

Book

Book:

Physics (Lakhmir Singh)

View solution

Question 3
Views

Views: 5,458

Question 80: Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros ?
(a) 5 kHz
(b) 25 Hz
(c) 10 Hz
(d) 15,000 Hz
Topic

Topic:

Sound

Book

Book:

Physics (Lakhmir Singh)

View solution

Question 4
Views

Views: 6,099

Question 60: The echo of a sound is heard after 5 seconds. If the speed of sound in air be 342 m/s, calculate the distance of the reflecting surface.
Topic

Topic:

Sound

Book

Book:

Physics (Lakhmir Singh)

View 2 solutions

Practice more questions from Sound

Question 1
Views

Views: 5,756

Question 20: Why should we not put a pin or pencil in our ears ?
Topic

Topic:

Sound

Book

Book:

Physics (Lakhmir Singh)

View solution

Question 2
Easy
Views

Views: 5,584

When we change feeble sound too loud sound we Increase Its
  1. frequency
  2. amplitude
  3. velocity
  4. wavelength
Topic

Topic:

Sound

View 2 solutions

Question 3
Views

Views: 6,026

Question 43: What is a megaphone ? Name the principle on which a megaphone works.

Figure
Topic

Topic:

Sound

Book

Book:

Physics (Lakhmir Singh)

View solution

Question 4
Views

Views: 5,672

Question 74: A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case :
(a) sound will be louder but pitch will not be different
(b) sound will be louder and the pitch will also be higher
(c) sound will be louder but pitch will be lower
(d) both loudness and pitch will remain unaffected
Topic

Topic:

Sound

Book

Book:

Physics (Lakhmir Singh)

View solution

Practice questions on similar concepts asked by Filo students

Question 1
Views

Views: 5,836

प्राकृत्तिक संसाधन पृथ्वी का सुरक्षा कवच-ओजोन ओजोन ऑक्सीजन का ही एक रूप है जिसमें ऑक्सीजन के तीन परमाणु होते हैं। इसका निर्माण वायुमंडल की ऊपरी परत में पराबैंगनी प्रकाश के द्वारा ऑक्सीजन गैस के टूटने से होता है। ओजोन वायुमंडल की बाहरी परत है, जो हमें हानिकारक पराबैगनी विकिरणों से सुरक्षित रखती है। हाल ही में पता चला है कि ओजोन परत का ह्रास (अवक्षय) बड़ी तेजी से होता जा रहा है। इसका मुख्य कारण मनुष्य द्वारा बनाए गए क्लोरोफ्लोरोकार्बन (chlorofluorocarbon, (FC) यौगिक है। ये बहुत स्थायी होते हैं और इनके स्थायित्व के कारण ये वायुमंडल में लंबे समय तक रहकर वायुमंडल की उपरी परत तक पहुँच जाते हैं, जहाँ ओजोन परत होती है। इसे समतापमंडल या स्ट्रैटोस्फियर (stratosphere) कहते हैं। यही सूर्य से आती पराबेंगनी विकिण को तोड़कर निम्नांकित रूप से क्लोरीन बनाती है। क्षति होती सकता है क्लोरीन का एक परमाणु एक लाख ओजोन परमाणुओं को विषाक्त नष्ट करता है। एंटार्कटिका वातावरण में ठंड के दिनों में यह गैसों को प्रकिया स्ट्रैटोस्फियर बादलों में मौजूद बर्फ के टुकड़ों के कारण नलिखित और तेज हो जाती है। इसी कारण ओजोन परत की क्षति दक्षिण ध्रुव पर सर्वाधिक है, जबकि का वितरण पूरी पृथ्वी के स्ट्रैटोस्फियर पर समान रूप से होता है। ओजोन परत के विनाश से अब ये विकिरण सीधे ही पृथ्वी बढ़ गई पर आ रहे हैं। पराबैंगनी विकिरण शरीर पर कई तरह से प्रभाव जल की डालता है। कुछ विकिरण लाभदायक भी होते हैं, जैसे चमड़ी में जंतु नष्ट विटामिन का बनना, पर इसके विपरीत कुछ विकिरण सनबर्न, मोतियाबिंद, चमड़ी का कैंसर और शरीर की प्रतिरोधक टर (वैग क्षमता को घटा देता है और शरीर कई तरह के संक्रमणों के प्रति संवेदनशील हो जाता है। का सर्वाधिक उपयोग पूरी 5 बनाए दुनिया में कार-एयरकंडीशनिंग, स्प्रे-कैन्स, रेफ्रीजरेशन तथा प्लास्टिक फोम उत्पादों में होता है।
Topic

Topic:

Chemistry

View solution

Question 2
Views

Views: 5,859

\Rightarrow N &=\frac{8}{32} \times 6.022 \times 10^{23} \\ \Rightarrow N &=1.5055 \times 10^{23} \\ &=1.51 \times 10^{23} \end{aligned} \] (iii) The number of particles (atom), number of number uestions 1. If one mole of carbon atoms weighs 12 grams, what is the mass (in grams) of 1 atom of carbon? 2. Which has more number of atoms. 100 grams of sodium or 100 grams of iron (given, atomic mass of ?
Topic

Topic:

Chemistry

View solution

Question 3
Views

Views: 5,871

This century Swedish scientist first developed a binomial nomenclature system of scientific classification and nomenclature based on common characteristics of living beings. Who was he?
  1. Carolus Linnaeus
  2. Charles Darwin
  3. Benjamin Franklin
  4. Jacques Cousteau
Topic

Topic:

Biology

View solution

Question 4
Views

Views: 5,268

10.1.1 ગુરુત્વાર્ષધાનો સાર્વત્રિક નિયમ सथन 4. सुत्वार्षंशनो सार्वत्रिક नियम समજાवो अने तेनुं गભितिક स्वરૂપ મેળवो. [3 गुझ]
Topic

Topic:

Physics

View solution

View more
Doubt Icon Doubt Icon

Stuck on the question or explanation?

Connect with our Science tutors online and get step by step solution of this question.

231 students are taking LIVE classes

Related books for questions on Sound

next icon
next icon
Question Text
Question 54: A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.
Updated OnMar 23, 2023
TopicSound
SubjectScience
ClassClass 9
Answer TypeText solution:1 Video solution: 1
Upvotes178
Avg. Video Duration9 min