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Syllabus

Derivation for doppler's effect?

at what temperature will the speed of sound be double its value at 273K

a whistle is being rotated in horizontal circle.What will be effect on sound frequency for a listener standing outside circle

please give the readings of sonometer experiment to find relation betweeen frequncy and length of the wire

Why fruits fall down from a tree, when its branches are shaken ?

y =5 / (4x +6t)^{2}, wherexandyare in metre andtis in second. The velocity of pulse is^{-2}and b = 9 sec^{-2}1. Travelling wave propagates along (+) $\times $ direction.

2. Travelling wave propagates along (-) $\times $ direction.

3. Speed of wave is $\frac{3}{5}$ m/sec.

4. Maximum displacement of particle is 5m.

pls explain as ans is no!

can you give me the derivation of y=Asin(wt-kx)?

(1) 2 cm (2) 4 cm (3) 1 cm (4) $\frac{4}{3}\phantom{\rule{0ex}{0ex}}$

4. A tightly-wound, long solenoid has n turns per unit length, a radius r and carries a current i. A particle having charge q and mass m is projected from a point on the axis of the solenoid in a direction perpendicular to the axis. What can be the minimum speed for which the particle should be projected to strike the solenoid?

(1) $\mu $

_{0}niqr/m (2) $\mu $_{0}niqr/2m (3) $\mu $_{0}niqr/4m (4) NoneA) 40 B)20 C)10 D)5

if two waves represented by y

_{1}= 4sin wt and y_{2}= 3sin[wt + pi/3] interfer at a point, the amplitude of the resulting wave will b {w = omega} :The sound intensity level at a point 4 m from the point source is 10 dB,then the sound level at a distance 2 m from the same source will be

^{-6 }m^{2}is rigidly fixed at both ends. The temperature of the wire is lowered by 20^{o}C. If transverse waves are set up by plucking the string in the middle, calculate the frequency of the fundamental mode of vibration.{for steel wire y=2 * 10

^{11}N/m^{2}α=1.21 * 10^{-5}/^{o}C}what is the essential condition for the formation of beats?

a sonometer wire has a length 114 cm between two fixeed ends.where should be two bridges placed so that 3 segments have fundamental frequencies in the ratio 1:3:4?

lof the string, tension F in the string and mass per unit lengthmof the string. Derive a possible formula for the velocity dimensionally.A transverse wave is described by the equation y=y

_{0 }sin2pie (ft-x/a). The maximum particle velocity is equal to 4 times the wave velocity, what is the value of 'a'.which of blue and red light will be deviated more by a prism and why?

Two identical flutes produce a fundamental notes of frequency of 300Hz at 27 degree centigrade. whenn the temperature of one tunning fork was increased to 31 degree centigrade the number of beats heard per second will be??

What are standing waves?

$\left(1\right)\frac{{\lambda}_{0}v}{c}\phantom{\rule{0ex}{0ex}}\left(2\right)\frac{{\lambda}_{0}c}{v}\phantom{\rule{0ex}{0ex}}\left(3\right)\frac{{\lambda}_{0}{v}^{2}}{{c}^{2}}\phantom{\rule{0ex}{0ex}}\left(4\right)Zero$

a tuning fork of unknown frequency gives 4 beats with a tuning fork of freqency 310 Hz. it gives the same no. of beats on filing. find the unknown frequency

what is the effect of density, humidity, pressure, temperature on velocity of sound waves?

Fundamental frequency of a sonometer wire increases by SHM.If its tension is increased by 21%.How will frequency be affected if its length is increased by 10%.Please give the method. (ans=45.45Hz).

what is doppler effect?

two tuning forks A and B produce 4 beats/sec.On loading B with wax, 6 beats/sec are heard.If quantity of wax is reduced, the number of beats per second again becomes 4.Find the frequency of B if the frequency of B if the frequency of A is 256 hz?

_{1}=4sin500(pi)t and Y_{2}= 2sin506(pi)t. No. of beats produced per minute isa) 360

b) 60

c) 180

d) 3

what is the difference between phase and phase constant

a list of different types of musical instruments and which part of the instrument vibrates to produce sound.

^{-1}show that in a closed end organ pipe only odd harmonies can be produced.

(i) 25 Hz

(ii) 50 Hz

(iii) 12.25 Hz

(iv) 33.3 Hz

derive newton's formula for velocity of sound in air.

b)40m/s

c)4000m/s

d)4m/s

Q. Example 15.2A wave travelling along a string is describe by,y (x ,t) = 0.005 sin (80.0 x – 3.0 t),

in which the numerical constants are in SI units (0.005 m, 80.0 and m

^{–1}, and 3.0 rad S^{–1}), Calculate (a) the amplitude. (b) the wavelength, and (c) the period and frequency of the wave. Also, calculate the displacement y of the wave at a distancex= 30.0 cm and timet= 20 s ?The displacement y at x = 30.0 cm and time t = 20 s is given by

y = (0.005 m ) sin ( 80.0 × 0.3 – 3.0 × 20)

= (0.005 m) sin ( – 36 + 12 $\mathrm{\pi}$)

= (0.00 5 m) sin (1.699)

= (0.005 m ) sin ( 97

^{0}) $\simeq $5 mmPlz say the answer with full process....plz plz

plzz reply soon

The fundamental frequency of the open organ pipe is 300 Hz.The frequency of the first overtone of the another closed organ pipe is the same as the frequency of the first overtone of open pipe.What are the length of the pipes ?? The speed of the sound is=330ms

^{-1}.Q. A standing sound wave in a pipe has five displacement nodes and five antinoges. What is the harmonic number of vibrations?

1.l/4,l/2

2.l/4,3l/4

3.l/2,l/4

4.l/2,3l/4

Correct ans is 1. Plz ans.

1) x-y $2)\frac{{x}^{2}-{y}^{2}}{2y}3)\frac{{x}^{2}+{y}^{2}}{2y}4)\frac{{x}^{2}+{y}^{2}}{x+y}$

(a) 50 Hz, 50 m/s, 20$\mathrm{\pi}$ m/s (b) 50 Hz, 20 m/s, 50 m/s

(c) 50 Hz, 50 m/s, 2$\mathrm{\pi}$ m/s (d) 50 Hz, 50 m/s, 4$\mathrm{\pi}$ m/s

what are matter waves ?

what is mach number???what is its significance?

@meritnation Expert

Q1)-The displacement of a wave is represented by

y=0.25x10^{-3}sin (500t-0.25x)where

y, tandxare in cm, sec and m respectively. Deduce (a) the amplitude (b) wavelength (c) angular frequency (d) time period (e) amplitude of particle velocity.what are progressive wave? and what are its characteristics and derive tthe equation of progressive wave.

Solve this:A travelling wave in a string is represented by y = 3 sin $\left(\frac{\mathrm{\pi}}{2}t\frac{\mathrm{\pi}}{4}x\right)$. The phase difference between two particles separated by a distance 4cm is (take x and y in cm and t in seconds )

$\left(1\right)\frac{\mathrm{\pi}}{2}rad\left(2\right)\frac{\mathrm{\pi}}{4}rad\phantom{\rule{0ex}{0ex}}\left(3\right)\mathrm{\pi}rad\left(4\right)0$

Two wires of the same material are stretched with the same force.Their diameters are 1.2 mm and 1.6 mm, while their lengths are 90 cm and 60 cm respectively.If the frequency of vibrations of first is 256 hz,find that of the other.

what are beats explain

1. 2N

2. 4N

3. 8N

4. 16N