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Which of the following statements are not true for sound ? (a) Sound waves are transverse waves. (b) Audible sound waves have frequency range of 20 kHz and above. (c) Sound waves require medium for propagation. (d) Non-periodic sound waves are termed as ‘Noise’. 
Which of the following statements is/are correct?   A) Sound waves are transverse waves. B) Audible sound waves have a frequency range of 20 kHz and above. C) Sound waves required a medium for propagation. D) Non-periodic sound waves are term as noise.
The depth of a sea can be determined by using SONAR. Consider the following statements about it: 1. It uses ultrasonic waves for the measurement of the depth of a sea. 2. The speed of ultrasonic waves in seawater is the same as that of sound in air. 3. Time taken by ultrasonic waves reflected from the bottom of the sea to reach the detector is used to measure the depth. Which of the above statement(s) is/are correct?
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: As the source continues to vibrate the medium, the vibrations propagate away from the source at the speed of sound, thus forming the sound wave. B: The sound source creates vibrations in the surrounding medium.  C: The sound waves are generated by a sound source, such as the vibrating diaphragm of a stereo speaker. D: Sound can propagate through a medium such as air, water, and solids as longitudinal waves and also as a transverse wave in solids.
"Too often we try to solve human problem with non-human tools and in terms of non-human data. It is my simple thesis that a human problem requires a human solution. First we have to learn to recognise a human problem when we see one; and second, upon recognising it, we have to learn to deal with it as such and not as it were something else. A human problem to be brought to a human solution requires human data and human tools". Who said this?
In the following question, the 1st and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/ passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations is correct. 1. Earthquakes are the shaking and moving of the ground when energy is released in waves.   P. These waves are similar to ocean waves, which move through water. Q. These waves are called seismic waves.  R. Seismic waves, however, move through the ground. S. Earthquakes can also be caused by other natural events, such as landslides and volcanoes.  6. Manmade earthquakes happen because of nuclear testing and mining explosions.
Consider the following with regard to ultrasonic sound waves.  I. They are used to measure the depth of the sea.  II. They are used for sterilization of a liquid.  III. They are used for removal of lamp-shoot from the chimney of factories.  Which among the above is NOT an application of the ultrasonic sound wave?
What is the frequency range of the ultrasonic sound waves used by the ultrasonic sensors?
The figure given below shows the function of ultrasonic waves. What are these techniques called?
Sounds waves and Motion mcq question image
Read the given statement and conclusions carefully and decide which of the conclusions logically follow(s) from the statement. Statement: Sound cannot travel in vacuum. Conclusions: I. We cannot hear sound of explosion in vacuum. II. We cannot hear sound of explosion in atmosphere