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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Unit 31 Sound
Sound is a longitudinal wave that travels faster in denser and more elastic materials and at higher temperatures. It travels fastest in solids like the ground, slower in liquids like water, and slowest in gases like air. The frequency of a sound wave determines its pitch, with higher frequencies corresponding to higher pitches. When a sound source moves towards a listener, the sound waves are compressed, increasing the observed frequency and pitch via the Doppler effect.
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Briefly introduce the topic of sound and its importance in our daily lives.
Engaging visuals: Vibrating speaker, musical notes, sound waves.
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Define sound as a form of energy produced by vibrations that travel through a medium.
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Discuss real-world applications of sound technology.
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Provide links to websites, books, or videos for further exploration.
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Open the floor for questions and discussions.
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Final3
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Sound travels as longitudinal waves through a medium such as solid, liquid, or gas. When an object vibrates, it disturbs the particles of the surrounding medium and creates an area where the particles are closer together (compression) and an area where they are further apart (rarefaction). These compressions and rarefactions travel through the medium as a sound wave. The wavelength is the distance between two compressions, and the frequency is the number of waves produced per second. A higher frequency means a higher pitch. Sound travels fastest through solids, then liquids, then gases.
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Sound travels as longitudinal waves through a medium such as solid, liquid, or gas. When an object vibrates, it disturbs the particles in the medium and creates an area where the particles are closer together (compression) and an area where they are further apart (rarefaction). These compressions and rarefactions travel through the medium as a sound wave. The wavelength is the distance between two compressions, and the frequency is the number of waves produced per second. A higher frequency means a higher pitch. Sound travels fastest through solids, then liquids, then gases. In space, sound cannot travel since there is no medium for the waves.
sound energy.ppt
Sound travels as longitudinal waves through a medium such as solid, liquid, or gas. When an object vibrates, it disturbs the particles of the surrounding medium and creates an area where the particles are closer together (compression) and an area where they are further apart (rarefaction). These compressions and rarefactions travel through the medium as a sound wave. The wavelength is the distance between two compressions, and the frequency is the number of waves produced per second. A higher frequency means a higher pitch. Sound travels fastest through solids, then liquids, then gases.
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1) Sound is produced by vibrations that create longitudinal waves which propagate through a medium and are detected by the human ear. The vibration of matter sets the air molecules in motion which transfers energy.
2) Factors like the thickness, length, and tension of the material producing the vibration determine the pitch and loudness of the sound. A thinner, shorter, or more tense material will produce a higher pitch sound.
3) The outer, middle, and inner ear work together to detect sounds. The outer ear collects sound waves which set the eardrum vibrating, transmitting the vibrations through a series of small bones to the cochlea where they are converted to nerve impulses sent to the
Sound
1) Sound is produced by vibrations that create longitudinal waves which propagate through a medium and are detected by the human ear. The vibration of matter sets the air molecules in motion which transfers energy.
2) Factors like the pitch and loudness of sound depend on characteristics of the propagating medium and vibrations. Pitch corresponds to frequency of vibrations and loudness depends on amplitude.
3) The human ear detects sound waves and converts them to electrical signals through a series of parts - the outer, middle and inner ear. The cochlea converts vibrations to neural signals sent to the brain for interpretation.
Sounds
Sound travels as longitudinal waves that carry energy through a medium such as air, water or other materials. It is produced by vibrations that create variations in pressure. The pitch of a sound depends on its frequency, with higher frequencies producing higher pitches. Loudness depends on amplitude, with greater amplitudes producing louder sounds. Different sounds at the same pitch and loudness can be distinguished by their timbre. The human ear can detect sounds from 20-20,000 Hz. Sound propagates more efficiently through denser materials like liquids and solids than gases, and travels at different speeds depending on the material.
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Ghocse the correct answer below. A. No, because the probabafy of burvival and the probabity of survival given a first class passenger are not the same. B. No, because the probabilify of survival and the probobility of survival given a first class passenger are the same. C. Yes, because the prebsebily of survival and the probabilty of survival glven a first class passonger are not the same D. Yet, because the probablity of survival and the probabi ty of survival gieen a frst clase pasbenger are the tame. and mises the tain? The probabily is proand to thee decmal places an Deedod.)
.
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Given Data:
MAGLIOCHETTI MOVING CORP.
Statement of Earnings Statement of Financial Position
For the Period Ended December 31, 2020
At December 31, 2020
Transportation revenue$90,000 Assets
Expenses:
Cash $2,000
Salaries expense15,000 Receivables 3,000
Maintenance expense14,000 Inventory of maintenance supplies 5,000
Other expenses20,000 Equipment 45,000
Total expenses$49,000 Prepaid expenses 5,000
Net earnings$41,000 Other assets 25,000
Total assets $85,000
Liabilities
Accounts payable $9,000
Shareholders' Equity
Contributed capital (10,000 shares outstanding) 35,000
Retained earnings 41,000
Total liabilities and shareholders' equity $85,000
Additional information:
Number of shares
10,000 (a)Maintenance supplies on hand, December 31, 2020
$3,000 (b)Prepaid insurance at December 31, 2020
$2,500
(Total insurance premium paid in 2020 was debited to Prepaid Insurance)
(c)Cost of equipment purchased on January 1, 2020
$45,000
Unrecorded depreciation expense for 2020
$9,000 (d)Unpaid (and unrecorded) salaries at December 31, 2020
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30%
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Briefly introduce the topic of sound and its importance in our daily lives.
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Define sound as a form of energy produced by vibrations that travel through a medium.
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Introduce the speed of sound and how it varies in different mediums.
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Sound
1) Sound is produced by vibrations that create longitudinal waves which propagate through a medium and are detected by the human ear. The vibration of matter sets the air molecules in motion which transfers energy.
2) Factors like the pitch and loudness of sound depend on characteristics of the propagating medium and vibrations. Pitch corresponds to frequency of vibrations and loudness depends on amplitude.
3) The human ear detects sound waves and converts them to electrical signals through a series of parts - the outer, middle and inner ear. The cochlea converts vibrations to neural signals sent to the brain for interpretation.
Sounds
Sound travels as longitudinal waves that carry energy through a medium such as air, water or other materials. It is produced by vibrations that create variations in pressure. The pitch of a sound depends on its frequency, with higher frequencies producing higher pitches. Loudness depends on amplitude, with greater amplitudes producing louder sounds. Different sounds at the same pitch and loudness can be distinguished by their timbre. The human ear can detect sounds from 20-20,000 Hz. Sound propagates more efficiently through denser materials like liquids and solids than gases, and travels at different speeds depending on the material.
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