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Maitri C Trivedi
Subject: Physics
, asked on 15/5/18
the frequency of a radar is 800MHz . the frequency of the reflected wave from the aeroplane is increased by 3.8KHz.the velocity of the aeroplane is
Answer
1
Yagyam Aggarwal
Subject: Physics
, asked on 29/4/18
An electric dipole of moment p is placed in a position of stable equilibrium in a uniform electric field of intensity E. What amount of work will be done if the dipole is rotated through an angle theta from its initial position?
Answer
2
Mayank Deshpande
Subject: Physics
, asked on 23/4/18
thanks
Q.3. For a certain transverse standing wave on a long string, an antinode is formed at x = 0 and next to it, a node is formed at x = 0.10 m. The displacement y(t) of the string particle at x = 0 is shown in figure.
(A) Transverse displacement of the particle at x = 0.05 m and t = 0.05 s is - 2
2
cm.
(B) Transverse displacement of the particle at x = 0.04 m and t = 0.025 s is - 2
2
cm.
(C) Speed of the travelling waves that interfere to produce this standing wave is 2 m/s.
(D) The transverse velocity of the string particle at x =
1
15
m and t = 0.1 s is 20
π
cm/s
Answer
1
Maitri C Trivedi
Subject: Physics
, asked on 16/4/18
the speed of sound in air at 15C is v1.if the temperature is doubled and the pressure halved,the speed is v2.then v1:v2 is
Answer
1
Hermoine
Subject: Physics
, asked on 10/4/18
Q. Can you help me in proving this formula
P
a
v
g
=
2
π
2
mνr
2
f
2
Answer
1
Hermoine
Subject: Physics
, asked on 10/4/18
How time 2*0.01 kindly explain
How is lambda 2*2 =4m
Q.10 A wave is described by the equation
y
=
1
.
0
m
m
sin
π
x
2
.
0
cm
-
t
0
.
01
s
.
(a) Find the time period and the wavelength ?
(b) Write the equation for the velocity of the particles. Fid the speed of the particle at x= 1.0 cm at time t=0.01.
(c) what are the speeds of the particles at x=1.0 cm at t=0.011, 0.012, and 0.013 s?
Answer
1
Hermoine
Subject: Physics
, asked on 9/4/18
Q. A travelling wave is produced on a long horizontal string by vibrating an end up and down sinusoidally. The amplitude of vibration is 1.0 and the displacement becomes zero 200 times per second. The linear mass density of the string is 0.10 kg/m and it is kept under a tension of 90 N. (a) Find the speed and the wavelength of the wave. (b) Assume that the wave moves in the positive x-direction and at t = 0, the end x = 0 is at its positive extreme position. Write the wave equation. (c) Find the velocity and acceleration of the particle at x = 50 cm at time t = l0 ms.
Answer
1
Rajarshi Das
Subject: Physics
, asked on 4/4/18
calculation of speed of transverse wave
Answer
1
Rajarshi Das
Subject: Physics
, asked on 4/4/18
what are the properties of stationary and progressive waves
Answer
1
Rajarshi Das
Subject: Physics
, asked on 4/4/18
what are stationary and progressive waves
Answer
1
Rajarshi Das
Subject: Physics
, asked on 4/4/18
what are beats and theory of formation of beat frequency(with diagram and graph)
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 30/3/18
Solve this:
Q.39. In a resonance tube experiment, the first and second resonance are heard at depths 22.7 cm and 70.2 cm respectively. The end correction of the pipe is
(1) 115.5 cm
(2) 82.5 cm
(3) 103.5 cm
(4) 1.05 cm
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 30/3/18
Q.37. A car is moving along x-axis with velocity v = 20 m/s, it sounds a whistle of frequency 660 Hz. If the speed of sound is 340 m/s, then the apparent frequency heard by the observer at the instant shown in the diagram is
(1) 640 Hz
(2) 720 Hz
(3) 700 Hz
(4) 680 Hz
Answer
1
Priyansh
Subject: Physics
, asked on 30/3/18
Q6. While the length is kept constant, the fundamental frequency of a sonometer wire increases by 6Hz on increasing the tension by 44% . Now if original tension in wire is kept constant, find the decrease in fundamental frequency of wire, when length of wire is increased by 20%
(A) 15Hz (B) 6Hz (C) 11Hz (D) 5Hz
Answer
2
Priyansh
Subject: Physics
, asked on 30/3/18
Q5. Two waves of equal frequencies are superimposed on each other. If the maximum intensity is 16 times of the minimum intensity, find the ratio of their amplitudes
(A) 4.0 (B) 1.6 (C) 0.6 (D) 0.80
Answer
1
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What are you looking for?
Q.3. For a certain transverse standing wave on a long string, an antinode is formed at x = 0 and next to it, a node is formed at x = 0.10 m. The displacement y(t) of the string particle at x = 0 is shown in figure. (A) Transverse displacement of the particle at x = 0.05 m and t = 0.05 s is - 2 cm.
(B) Transverse displacement of the particle at x = 0.04 m and t = 0.025 s is - 2 cm.
(C) Speed of the travelling waves that interfere to produce this standing wave is 2 m/s.
(D) The transverse velocity of the string particle at x = m and t = 0.1 s is 20 cm/s
How is lambda 2*2 =4m
Q.10 A wave is described by the equation
(a) Find the time period and the wavelength ?
(b) Write the equation for the velocity of the particles. Fid the speed of the particle at x= 1.0 cm at time t=0.01.
(c) what are the speeds of the particles at x=1.0 cm at t=0.011, 0.012, and 0.013 s?
Q.39. In a resonance tube experiment, the first and second resonance are heard at depths 22.7 cm and 70.2 cm respectively. The end correction of the pipe is
(1) 115.5 cm
(2) 82.5 cm
(3) 103.5 cm
(4) 1.05 cm
(1) 640 Hz
(2) 720 Hz
(3) 700 Hz
(4) 680 Hz
(A) 15Hz (B) 6Hz (C) 11Hz (D) 5Hz
(A) 4.0 (B) 1.6 (C) 0.6 (D) 0.80