Wave (a) has the greater wavelength because its consecutive crests are spaced farther apart along the distance axis and it also possesses the smaller amplitude due to lower vertical crest height. Class 9 Science Exploration Chapter 10 Important Questions from Sound ...
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It produces reverberation. An echo requires a minimum delay of 0.1 seconds to be perceived distinctly, whereas reflections arriving within 0.05 seconds persist and blend into reverberation. Class 9 Science Exploration New Book All Chapter Solution Revise, Reflect, Refine Chapter 10 ...
The correct option is (ii). Frequency equals total oscillations divided by time taken. Dividing 20 compressions by 4 seconds yields 5 oscillations per second, which equals 5 Hz. Chapter 10 Sound Waves Characteristics and Applications Solutions Sound Waves Characteristics and Applications ...
The correct option is (iii). Frequency measures complete oscillations per second; higher frequency increases the count of compressions passing a fixed point each second while shortening wavelength and time period. CBSE Class 9 Science Chapter 10 Sound Waves Characteristics and Applications ...
The farmer should use vegetative propagation techniques like stem cuttings, layering or plant tissue culture. These methods reproduce plants rapidly from somatic tissues while ensuring identical, desirable parental traits. Class 9 Science Exploration New Book All Chapter Solution Revise, Reflect, Refine Chapter ...