Given that Young's modulus for aluminium is 7.0 x 1010 Nm-2 and density is 2.7 x 103kgm-3 find the speed of the sound produced if a solid bar is struck at one end with a hammer
3.6 x 103 ms-1
5.1 x 103 ms-1
2.8 x 103 ms-1
4.2 x 103 ms-1
A plane sound wave of frequency 85.5 Hz and velocity 342 ms-1 is reflected from a vertical wall. At what distance from the wall does the wave have an antinode?
Find the frequencies of the first three harmonics on a piano string of length 1.5m, if the velocity of the waves on the spring is 120 ms-1
360 Hz, 180 Hz, 90 Hz
180 Hz, 360 Hz, 540 Hz
80Hz, 160 Hz, 240Hz
40 Hz, 80 Hz, 120Hz
The equation of a wave traveling along the positive x-direction is given by y= 0.25 x 10-3 sin ( 500t - 0.0025x). Determine the angular frequency of the wave motion.
0.25 x 10-3 rad s-1
0.25 x 10-1 rad s-1
5.00 x 102 rad s-1
2.50 x 103 rad s-1
The velocity of a sound wave at 27°C is 360 ms-1 . It velocity at 127°C is
720 √3 ms-1
A steel wire of length 0.50 m is streched between two fixed points and its fundamental frequency is 200 Hz. The speed of the wave in the wire is
Which of the diagrams below represents the second overtone of a vibrating string fixed at both ends?
The sound from a source traveled to the bottom of the sea and the echo was heard 4s later. If the speed of sound in sea water is 1500ms-1, the depth of the sea is
A pipe of length 45 cm is closed at one end. Calculate the fundamental frequency of the sound wave generated in the pipe if the velocity of sound in air is 360 ms-1 ( Neglect end corrections )
5. 5 Hz
The fundamental frequency of vibration (f) of a wire is measured as a function of the tension (T) in the wire. Which of the following curves adequately represents the data?
Radio waves emitted from an antenna are picked up by a radar after reflection from an aircraft in 4 x 10-3 s. How far is the aircraft from the antenna? [c= 3 x 103 ms-1]
6.0 X 102 km
1.2 X 103 km
3.0 x 103 km
6.0 X 105 km
The equation of a wave Y = 0.005 sin X [ 0.5x - 200t) where x and y are in metres and t is in seconds. What is the velocity of the wave?
4000 m s-1
400 m s-1
250 m s-1
40 m s-1