Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

A train standing on a platform is blowing a whistle of  frequency 400Hz calculate

1. Frequency

2. wave length

3. the speed of the sound as observed by a person standing a few meters away from the platform toward the observer with a speed of 10Ms-1

 

Asked by Aakrati Gawande | 26 Mar, 2014, 06:38: PM
answered-by-expert Expert Answer
f equals space 400 space H z S p e e d space o f space s o u n d comma space V space equals space 340 space m divided by s S p e e d space w. r. t. space s o u r c e space equals space 10 space m divided by s W h e n space t h e space t r a i n space a p p r o a c h e s space t h e space o b s e r v e r space w i t h space s p e e d space equals space 10 space m divided by s A p p a r e n t space f r e q u e n c y space equals space fraction numerator V over denominator V minus V subscript s end fraction f f apostrophe space equals fraction numerator 340 over denominator 340 minus 10 end fraction cross times 400 equals 412.1 space H z
Answered by | 29 Mar, 2014, 01:24: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 11-science - Physics
The second overtone of a pipe closed at one end has the same frequency as the third overtone of a pipe open at both ends. Compare the length of the pipes
Asked by emad.amd | 21 Mar, 2024, 12:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Help
question image
Asked by sherry.sharma771 | 08 Feb, 2023, 08:25: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Please refer to the uploaded image for the doubt. [In the image, length of the open pipe=0..6m] // *SORRY FOR BAD QUALITY* //
question image
Asked by arjunsah797 | 17 May, 2022, 01:19: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
how to prove that the frequencies produced in the string are in the ratio 1:2:3
Asked by lakshmiks703 | 17 Apr, 2022, 07:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
The frequency is directly proportional to length multiplied by tension and mass in the length of string .derive the formula of frequency
Asked by Umeshlochab80 | 12 May, 2021, 09:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
The velocity of the wave in of sound depends on bulk modulus and density of the medium derive the formula of velocity
Asked by umeshlochab887 | 12 May, 2021, 06:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
show that in the case of closed organ pipe, the ratio of the frequencies of the harmonics is 1:3:5:7.​
Asked by ks076345 | 22 Mar, 2021, 09:20: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
A photograph of a house occupied an area of 1.75 sq.cm on a 35mm slide.The slide is projected on to a screen and the area of the house on the screen is 1.55 sq.m.What is the linear magnification of the projector-screen system?
Asked by pb_ckt | 22 May, 2019, 10:19: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Pls solve.
question image
Asked by pb_ckt | 21 May, 2019, 02:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
The diameter of an iron wire is 1.20mm. If the speed of the transverse wave in the wire be 50.0m/s , what is the tension in the wire ? The density of iron os 7.7 × 10 raise to 3 k/ m cube
Asked by drbharatkaila | 13 Feb, 2019, 07:38: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×