Last seen: Jan 25, 2021
The function of the human ear is shown in figure. 2s.png The outer ear collects sound wave which are conducted through the auditory canal. T...
Ultrasounds can be used to detect cracks and flaws in metal blocks. Metallic components are used in the construction of big structures like buildings,...
Here, time interval between the transmission of the signal and its reception, t = 5 s. Distance of the object from the submarine, d = 3625 m. If v is ...
SONAR consists of a transmitter and a detector and is installed in a boat or a ship as shown in figure. 2s.png The transmitter produces and tra...
Ultrasound is used to clean parts located in hard-to-reach places, i.e., spiral tube, odd shaped parts, electronic components etc. Objects to be clean...
The ultrasonic waves emitted by the bat are reflected from the prey (e.g., an insect) and are detected by its ears shown in figure. The nature of refl...
Loudness is a physiological response of the ear to the intensity of sound. Loudness of a sound depends on the amplitude of the vibration producing tha...
The persistence of sound in an auditorium as a result of repeated reflections of sound is called reverberation. To reduce the undesirable effects due ...
Here, speed of sound wave, v = 339 m s-1 Wavelength of sound wave, λ = 1.5 cm = 1.5 x 10-2 m Frequency of the sound wave, v = = = 22600 H...
Here, height through which the stone falls, h = 500 m Speed of sound, v = 340 ms-1, g = 10 ms-2 If t is the time taken by the stone to fall throug...
Ear Trumpet : It is a sort of machine used by persons who are hard of hearing. The sound energy received by the wide end of the trumpet is connected i...
The minimum distance (d) for the distinct echo to be heard (say at 22°C) is 17.2 m (as 2d = vt = 344 × 0.1 = 34.4 m). On a hotter day, the temperature...
Yes, sound follows the same laws of reflection as light does because, Angle of incidence of sound is always equal to angle of reflection of sound ...
Frequency of sound = 100 Hz Time taken = 1 minute = 60 s We know, frequency = No. of oscillations = v x t = 100 x 60 = 6000 times
Speed of sound in air, vx = 346 m s-1 Speed of sound in aluminium, v2 = 6420 m s-1 Let the length of the aluminium rod = x m We know that speed =...
Here, v1 = 20 Hz and v2 = 20 kHz = 20 x 103 Hz, speed of sound, v = 344 ms-1 Clearly, = = 17.2 m and, = = 0.0172 m
The speed of light (c) is greater than the speed of sound (u) by a factor of 106 as = Thus, the flash of light is seen earlier than the thunder ...
The quality (or timbre) of sound is that characteristic which enables us to distinguish one sound from the other even when these are of the same pitch...
A sound wave is called a longitudinal wave as it travels in a medium in the form of compressions and rarefactions where the particles of the medium vi...