1. Write true or false for each statement: (a) Sound can travel in vacuum. (b) Sound is a form of energy. (c) Sound can only be produced by vibrating bodies. (d) Larger is the ampl... 1. Write true or false for each statement: (a) Sound can travel in vacuum. (b) Sound is a form of energy. (c) Sound can only be produced by vibrating bodies. (d) Larger is the amplitude, feeble is the sound. (e) The frequency is measured in hertz. (f) Loudness depends on frequency. (g) Waveforms of two different stringed instruments can be the same. (h) Female voice is shriller than the male voice. (i) A ticking clock sound is heard late when heard through a metal. 2. Fill in the blanks: (a) Sound is produced when a body ______. (b) The number of times a body vibrates in one second is called its ______. (c) The pitch of a sound depends on its ______. (d) Sound can travel in a ______. (e) We can hear sounds of frequency in the range of ______ Hz. (f) Sound requires a ______ for propagation. (g) Sound travels faster in ______ than in liquids. (h) The sound heard after reflection is ______.
Understand the Problem
The question is centered on the properties and behavior of sound, specifically involving true or false statements and fill-in-the-blank activities related to sound concepts.
Answer
1. (a) False, (b) True, (c) True, (d) False, (e) True, (f) False, (g) False, (h) True, (i) False. 2. (a) vibrates, (b) frequency, (c) frequency, (d) medium solid, liquid or gas, (e) 20 Hz to 20,000 Hz, (f) medium, (g) solids, (h) echo.
- True or False: (a) False, (b) True, (c) True, (d) False, (e) True, (f) False, (g) False, (h) True, (i) False. 2. Fill in the blanks: (a) vibrates, (b) frequency, (c) frequency, (d) medium solid, liquid or gas, (e) 20 Hz to 20,000 Hz, (f) medium, (g) solids, (h) echo.
Answer for screen readers
- True or False: (a) False, (b) True, (c) True, (d) False, (e) True, (f) False, (g) False, (h) True, (i) False. 2. Fill in the blanks: (a) vibrates, (b) frequency, (c) frequency, (d) medium solid, liquid or gas, (e) 20 Hz to 20,000 Hz, (f) medium, (g) solids, (h) echo.
More Information
Sound requires a medium to travel; it cannot travel through a vacuum. It is produced by vibrating objects and can move faster in solids than in liquids. Loudness is related to amplitude, not frequency.
Tips
Common mistakes include confusing the concepts of pitch and loudness, as well as misunderstanding how sound travels faster in different mediums.
Sources
- Chapter 6: Sound | Selina Solutions Concise Physics Class 7 ICSE - knowledgeboat.com
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