Write 'true' or 'false' for the following statement :
Subsonic waves are used in dish washing machines.

Write 'true' or 'false' for the following statement : Sound energy is reflected by soft and loose surfaces.

Write 'true' or 'false' for the following statement : The range of sonic vibrations is between 20 Hz and 20,000 Hz.

Write 'true' or 'false' for the following statement : With the increase in the frequency of a body, the sound becomes shrill.

Write 'true' or 'false' for the following statement : More the amplitude of a vibration, less is its loudness.

Write true or false for the following statement. With the decrease in amplitude of a vibrating particle its pitch becomes bass.

Write true or false for the following statements. The molecules of a gas contained in a closed vessel are stationary.

Write true or false for the following statements: Steam at 100^(@)C causes more severe burns than water at 100^(@)C _________.

Write true or false for the following statement. We can easily make out the difference between the sound of a sitar and that of a violin.

Write True or False for the following statement: The position of molecules in a liquid continuously change._____________.

Write true or false for the following statements: A vapour is a gaseous state of a liquid below its boiling point.