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The following problems are each worth 4 points. There is partial credit....
7. Suppose that a public-address system emits a 494 Hz sound uniformly in all directions. (a)...
7. Suppose that a public-address system emits a 494 Hz sound uniformly in all directions. (a) If the air temperature is 25°C (sound travels at 346 m/s), what is the wavelength of this sound? (b) If the intensity at a location 22 m away from the sound source is 3x104 W/m2, what is the power of the sound coming from the speaker? Answer 8. Two boys are pulling a box across a horizontal floor. If Fi- 50 N, 30° N...
Suppose that a public-address system emits a 494 Hz sound uniformly in all directions. (a) If...
Suppose that a public-address system emits a 494 Hz sound uniformly in all directions. (a) If the air temperature is 25oC (sound travels at 346 m/s), what is the wavelength of this sound? (b) If the intensity at a location 22 m away from the sound source is 3x10-4 W/m2 , what is the power of the sound coming from the speaker?
QUESTION 3 A sonar echo returns to a submarine 0.9 s after being emitted. What is...
QUESTION 3 A sonar echo returns to a submarine 0.9 s after being emitted. What is the distance to the object creating the echo? (Assume that the submarine is in the ocean, and the speed of sound in ocean water is 1540 m/s) Express the numeral of your answer in SI units with 3 or more significant figures. QUESTION 4 Infrasonic waves have the frequencies in this range: Below 20 Hz Above 20 kHz 20 Hz -20 kHZ QUESTION 5...
12) The diddley bow is an instrument which consists of a single-string tensioned between two points...
12) The diddley bow is an instrument which consists of a single-string tensioned between two points on a board, often using a glass bottle (see figure) for a bridge and a way to amplify the instrument's sound. The speed of sound in air is v = 343 m/s. a) What tension (in N) is required in a string with mass-per-unit-length u = 1 g/m to produce a fundamental frequency of G, or 49 Hz, if the length is L =...
please answer part B - thanks! Ha 120-W lightbulb emits 2.5% of the input energy as...
please answer part B - thanks!
Ha 120-W lightbulb emits 2.5% of the input energy as visible light (average wavelength 560 nm) uniformly in all directions Part A How many photons per second of visible light will strike the pupil (4.0 mm diameter) of the eye of an observer 1.0 m away? Express your answer using two significant figures. ΔΝ, At 8.3K1012 photons/s Previous Answers Correct N Part B How many photons per second of visible light will strike the...
Please answer all parts of Part (b) please only answer if you can do so correctly,...
Please answer all parts of Part (b)
please only answer if you can do so correctly, and
showing working out.
Question 4 (a) A sound wave with a frequency of 250 Hz is transmitted through air at 25° C (298.2K). The specific gas constant for air is 287 J/kg K, and the specific heat ratio is y = 1.40. Determine: (i) (ii) The speed of sound, The wavelength, The wave number, The angular frequency for this condition. (iii) (iv) [8...
Please answer both questions thank you One type of cuckoo clock keeps time by having a...
Please answer both questions
thank you
One type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. What force constant is needed to produce a period of 0.900 s for a 0.0175 kg mass? × N/m Submit Answer Save Progress 1 points OSColPhys2016 17.3.P.021. My Notes Ask Your Tea People with good hearing can perceive sounds as low in level as -8.78 dB at a frequency of...
TULA. Each multiple-choice question is worth 4 points - you must circle the most correct answer...
TULA. Each multiple-choice question is worth 4 points - you must circle the most correct answer (2 points) and justify your answer (2 points). 1. A fire truck approaches you with its siren on. Which of the following statements is false about the signal you receive from the fire truck? a. The siren sounds louder to you. b. The frequency of the sound increases. C. The wavelength of the sound decreases. d. The speed of the sound increases. Explain your...
Short Answer: The following 8 questions are worth 5 points each. Please provide your answers in...
Short Answer: The following 8 questions are worth 5 points each. Please provide your answers in the form of few brief sentences, solved equations, or graphs / diagrams. (16) The snapshot graph shown below was taken at t = 0s. Determine: i. The frequency of the wave. y (cm) ii. The phase constant of the wave. 24 m/s -x (m) 8 12 16 20 -2 Computational questions: The following 4 questions are worth 7.5 points each. Please provide your answers...
question 4-7 4. Travelling Waves and Their Characteristics A rope wave travels in the positive x -direction. You are also told that the speed of the wave is 1000 cm/s, its frequency is 200 H...
question 4-7
4. Travelling Waves and Their Characteristics A rope wave travels in the positive x -direction. You are also told that the speed of the wave is 1000 cm/s, its frequency is 200 Hz, and that the wave is subject to the following initial conditions: at x 0 and t = 0: y =-1 cm, and, at x = 0 and t : ar = +20 cm/s (this is the velocity of the point on the rope at horizontal...
7. Suppose that a public-address system emits a 494 Hz sound uniformly in all directions. (a) If the air temperature is 25°C (sound travels at 346 m/s), what is the wavelength of this sound? (b) If the intensity at a location 22 m away from the sound source is 3x104 W/m2, what is the power of the sound coming from the speaker? Answer 8. Two boys are pulling a box across a horizontal floor. If Fi- 50 N, 30° N...
QUESTION 3 A sonar echo returns to a submarine 0.9 s after being emitted. What is the distance to the object creating the echo? (Assume that the submarine is in the ocean, and the speed of sound in ocean water is 1540 m/s) Express the numeral of your answer in SI units with 3 or more significant figures. QUESTION 4 Infrasonic waves have the frequencies in this range: Below 20 Hz Above 20 kHz 20 Hz -20 kHZ QUESTION 5...
12) The diddley bow is an instrument which consists of a single-string tensioned between two points on a board, often using a glass bottle (see figure) for a bridge and a way to amplify the instrument's sound. The speed of sound in air is v = 343 m/s. a) What tension (in N) is required in a string with mass-per-unit-length u = 1 g/m to produce a fundamental frequency of G, or 49 Hz, if the length is L =...
please answer part B - thanks!
Ha 120-W lightbulb emits 2.5% of the input energy as visible light (average wavelength 560 nm) uniformly in all directions Part A How many photons per second of visible light will strike the pupil (4.0 mm diameter) of the eye of an observer 1.0 m away? Express your answer using two significant figures. ΔΝ, At 8.3K1012 photons/s Previous Answers Correct N Part B How many photons per second of visible light will strike the...
Please answer all parts of Part (b)
please only answer if you can do so correctly, and
showing working out.
Question 4 (a) A sound wave with a frequency of 250 Hz is transmitted through air at 25° C (298.2K). The specific gas constant for air is 287 J/kg K, and the specific heat ratio is y = 1.40. Determine: (i) (ii) The speed of sound, The wavelength, The wave number, The angular frequency for this condition. (iii) (iv) [8...
Please answer both questions
thank you
One type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. What force constant is needed to produce a period of 0.900 s for a 0.0175 kg mass? × N/m Submit Answer Save Progress 1 points OSColPhys2016 17.3.P.021. My Notes Ask Your Tea People with good hearing can perceive sounds as low in level as -8.78 dB at a frequency of...
TULA. Each multiple-choice question is worth 4 points - you must circle the most correct answer (2 points) and justify your answer (2 points). 1. A fire truck approaches you with its siren on. Which of the following statements is false about the signal you receive from the fire truck? a. The siren sounds louder to you. b. The frequency of the sound increases. C. The wavelength of the sound decreases. d. The speed of the sound increases. Explain your...
Short Answer: The following 8 questions are worth 5 points each. Please provide your answers in the form of few brief sentences, solved equations, or graphs / diagrams. (16) The snapshot graph shown below was taken at t = 0s. Determine: i. The frequency of the wave. y (cm) ii. The phase constant of the wave. 24 m/s -x (m) 8 12 16 20 -2 Computational questions: The following 4 questions are worth 7.5 points each. Please provide your answers...
question 4-7
4. Travelling Waves and Their Characteristics A rope wave travels in the positive x -direction. You are also told that the speed of the wave is 1000 cm/s, its frequency is 200 Hz, and that the wave is subject to the following initial conditions: at x 0 and t = 0: y =-1 cm, and, at x = 0 and t : ar = +20 cm/s (this is the velocity of the point on the rope at horizontal...
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