waves

Question 1

equation of wave

Question 2

angular wave number

Question 3

relation between particle velocity and wave velocity

Answer 3

-vp dy/dx

Question 4

velocity of particle

Answer 4

dy/dt

Question 5

phase difference

Answer 5

=2 pi/lamda { delta x}

Question 6

kinetic energy of a travelling wave

Answer 6

1/4 mu lambda omegasquare Amplitudesquare

Question 7

potential energy

Answer 7

1/4 mu lambda omegasquare Amplitudesquare

Question 8

velocity of transverse wave on a stretched string

Answer 8

v= underroot{ T/mu}=underoot {T/density*area}

Question 9

power

Answer 9

1/2 mu omegasquare Asquare v =1/2 omegasquare Asquare density area

Question 10

intensity

Question 11

resultant amplitude during reflection

Question 12

reflection coefficient

Question 13

relation between amplitude of transmitted and incident wave

Question 14

reflection coefficient in terms of velocities

Answer 14

va-vb/va+vb

Question 15

equation of longitudinal wave

Answer 15

delta p = -bak cos {kx-wt}

Question 16

velocity of longitudinal wave

Answer 16

root {B/DENSITY}…..B=BULK MODULUS

Question 17

speed of sound in solid

Answer 17

v=root {youngs modulus /Density}

Question 18

speed of sound in liquid and gas

Answer 18

velocity =root {bulk modulus /density }

Question 19

laplace correction

Answer 19

bulk modulus =gamma *pressure

where gamma is cp/cv

Question 20

pressure,molecular mass relation

Answer 20

P={density R T } /M. ………… M.=molecular mass

R=rydbergs constant

Question 21

velocity of sound in gases {in terms of gamma}

Answer 21

v=underroot [gamma R T /M. }

Question 22

formula to find net amplitude

Question 23

net intentensity formula

Question 24

equation of standing wave

Answer 24

2A sin kx coswt

Question 25

when string is fixed at both ends ..fundamental frequency of vibration

Answer 25

f=v/2L

Question 26

fundamental frequency of string free at an end

Answer 26

v/4L

Question 27

general expression of string free at ends

Question 28

fundamental f of string free at one end

Question 29

fundamental f of open organ pipe

Question 30

fundamental and general f of organ closed at 1 end

Question 31

frequency in resonance column experiment

Question 32

end correction in resonce column experiment

Answer 32

0.3 *diameter

Question 33

velocity in resonance column experiment

Answer 33

v=2 f ( L2-L1)

Question 34

velocity in resonance column experiment

Answer 34

v=2 f ( L2-L1)

Question 35

Apparent frequency when vo and vs approach each other

Answer 35

(vo+v)/v-vs

Question 35

Apparent frequency when vo and vs approach each other

Answer 35

(vo+vs)/v-vs

Question 36

apparent frequency if both object and source are moving away

Answer 36

vo