Sound waves and reflection of sound

1.	Formula and unit Difficulty: easy	4
2.	Vibrating part of musical instruments Difficulty: easy	2
3.	Numericals based on Time period and frequency Difficulty: easy	2
4.	Sound waves and their nature Difficulty: easy	2
5.	Velocity of sound waves Difficulty: easy	4
6.	Sound range Difficulty: medium	3
7.	Types of sound waves Difficulty: medium	3
8.	Wavelength of a sound wave Difficulty: medium	3
9.	Nature and speed of the sound wave Difficulty: medium	4
10.	Riddles on sound waves Difficulty: medium	4
11.	Numerical based on time period Difficulty: medium	3
12.	Basics of acoustics Difficulty: medium	2
13.	Comparison between light and sound Difficulty: medium	3
14.	Sound- Match the right terms Difficulty: medium	4
15.	Amplitude and frequency Difficulty: medium	2
16.	Assertion and reasoning type excercise Difficulty: medium	6
17.	Range of sound waves Difficulty: medium	3
18.	Numerical based on SONAR Difficulty: medium	4
19.	Numerical based on the speed of the sound wave Difficulty: medium	4
20.	Numerical based on the time period Difficulty: medium	4
21.	Numerical based on the wavelength of a sound wave Difficulty: medium	3
22.	Speed of sound waves in water Difficulty: medium	4

Methodical recommendation

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