Which of the following is a FALSE statement about sound- a-the thresho.docx

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Which of the following is a FALSE statement about sound? a.the threshold of hearing is 1 decibal b.it travels faster inside solids than in air d.it travels faster in air when the temperature is hotter e.sonic boom happens when objects travel at supersonic speeds c.sound pitch refers to its frequency Solution a) FALSE The threshold of hearing is assigned a sound level of 0 decibels (abbreviated 0 dB ) b)TRUE Because they are so close, than can collide very quickly, i.e. it takes less time for a molecule of the solid to \'bump\' into its neighborough. Solids are packed together tighter than liquids and gases, hence sound travels fastest in solids . The distances in liquids are shorter than in gases, but longer than in solids d)TRUE Heat is also a kind of kinetic energy like sound. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. The speed of sound in room temperature air is 346 meters per second. e)TRUE A sonic boom is the sound associated with the shock waves created whenever an object traveling through the air travels faster than the speed of sound. ... Rather the boom is a continuous effect that occurs while the object is travelling at supersonic speeds . c)TRUE The sensation of a frequency is commonly referred to as the pitch of a sound . A high pitch sound corresponds to a high frequency sound wave and a low pitch sound corresponds to a low frequency sound wave. .

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c)TRUE
The sensation of a frequency is commonly referred to as the pitch of a sound . A high pitch
sound corresponds to a high frequency sound wave and a low pitch sound corresponds to a
low frequency sound wave.

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