For a source at 100 kHz in sea water at what range is loss due to...
For a source at 100 kHz in sea water at what range is loss due to absorption greater than the transmission loss due to spherical spreading? Answer 2232 m using alpha=0.03 dB/m
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For a source at 100 kHz in sea water at what range is loss due
to...
3) For a source at 100 kHz in sea water at what range is loss due...
3) For a source at 100 kHz in sea water at what range is loss due to absorption greater than the transmission loss due to spherical spreading? 4) For a source at 1000 Hz in sea water is transmission loss due to absorption in sea water greater than the transmission loss due to cylindrical spreading over the first 100 km in100m water depth?
Find the skin depth for sea water whose resistivity is ρ = 0.20 Ω / m...
Find the skin depth for sea water whose resistivity is ρ = 0.20 Ω / m for a frequency of 30 Khz and 30 Mhz. What frequency would you use to communicate with a submarine that is at a depth of less than 100 m?
Answer question 2 1. Plot the transmission loss as a function of frequency between 100 Hz...
Answer question 2
1. Plot the transmission loss as a function of frequency between 100 Hz and 10 kHz for the following types of "walls": a) A sheet rock and stud wall, ?-20 kg/m2 b) A plaster, lath and stud wall. ?-60 kg/m2 c) A glass window, ?-8 kg/m d) A brick and plaster wall, o-450 kg/m2. e) A solid wood door, ?-35 kg/m2. f) A hollow core door, ?-5 kgm2 Calculate the transmission loss of a wall that is...
Dolphins emit sound bursts that range in frequency from 1 Hz to 120 kHz. Say that...
Dolphins emit sound bursts that range in frequency from 1 Hz to 120 kHz. Say that a dolphin is using a sound burst consisting of these frequencies as a form of sonar, like bats. Let the burst last for a time interval of 10 ms, after which it listens for 100 ms. Say that the logarithmic intensity (loudness) of the dolphin's sound is 50 dB as measured at 1 m away. Dolphins can hear sounds that are 2 dB below...
Answer questions 12-15 12. A source and receiver, each 3 feet off the ground, are separated...
Answer questions 12-15
12. A source and receiver, each 3 feet off the ground, are separated by a distance of 20 feet. If a 7 foot tall barrier is placed at the midpoint between them, what is the Fresnel number at 1,000 Hz? a. 1.3 b. 2.7 c. 3.8 d. 4.2 e. 5.9 f. None of the above 13. A spherical wave at 1,000 Hz has a peak pressure amplitude of 0.04 Pa at a radius of 3 meters. What...
Design an amplifier with a gain of 10 that is to operate from a single positive...
Design an amplifier with a gain of 10 that is to operate from a single positive voltage source and deliver 2 volts peak to a 1K load at 1 KHz. The input resistance of the amplifier must be greater than 100 K and the low frequency response is to go down to 5 hz with no more than 3 dB signal loss. question1 “What is a reasonable power supply voltage?” according to the statement above here is some example i...
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111...
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111 W (a) Find the intensity 10.7 m from the source. 0.76 Your response differs from the correct answer by more than 100%, w/m? (b) Find the intensity level in decibels at that distance. 118.8 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation Cary out all inter to...
Part A What is the boiling point of water at an elevation of 1.25*10* ft ?...
Part A What is the boiling point of water at an elevation of 1.25*10* ft ? Express your answer with the appropriate units using three significant figures View Available Hint(s) CHAR O ? T= Value Submit Provide Feedback <Ch 11 Assignment Vapor Pressure The vapor pressure of a substance describes how readily molecules at the surface of the substance enter the gaseous phase. At the boiling point of a liquid, the liquid's vapor pressure is equal to or greater than...
Heat transfer project - i need help to see what direction you would take this problem in order to...
heat transfer project - i need help to see what direction you
would take this problem in order to make the design.
Design a counter-flow, concentric-tube heat exchanger to use water forc al power station. The mass flow rate of the oil is given as 0.2 kg/s, and its inlet emperature is 90°C. The water is available at 20°C, but its temperature rise is restricted to 12.5°C of environmental concerns. The outer tube diameter must be less than 5 cm,...
you can skip task 1 (3) because its a code in matlab. Task 1: You were asked to check up the status of the water system. Water at 24 °C is to be pumped from a Lower reservoir with 100 m elevation to...
you can skip task 1 (3) because its a code in
matlab.
Task 1: You were asked to check up the status of the water system. Water at 24 °C is to be pumped from a Lower reservoir with 100 m elevation to another reservoir at a higher elevation 112 m through 150-m-long pipe as shown in Figure (1). The pipe is made of steel, and the diameter ofthe pipe is equal to 30 cm water is to be pumped...
Answer question 2
1. Plot the transmission loss as a function of frequency between 100 Hz and 10 kHz for the following types of "walls": a) A sheet rock and stud wall, ?-20 kg/m2 b) A plaster, lath and stud wall. ?-60 kg/m2 c) A glass window, ?-8 kg/m d) A brick and plaster wall, o-450 kg/m2. e) A solid wood door, ?-35 kg/m2. f) A hollow core door, ?-5 kgm2 Calculate the transmission loss of a wall that is...
Answer questions 12-15
12. A source and receiver, each 3 feet off the ground, are separated by a distance of 20 feet. If a 7 foot tall barrier is placed at the midpoint between them, what is the Fresnel number at 1,000 Hz? a. 1.3 b. 2.7 c. 3.8 d. 4.2 e. 5.9 f. None of the above 13. A spherical wave at 1,000 Hz has a peak pressure amplitude of 0.04 Pa at a radius of 3 meters. What...
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111 W (a) Find the intensity 10.7 m from the source. 0.76 Your response differs from the correct answer by more than 100%, w/m? (b) Find the intensity level in decibels at that distance. 118.8 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation Cary out all inter to...
Part A What is the boiling point of water at an elevation of 1.25*10* ft ? Express your answer with the appropriate units using three significant figures View Available Hint(s) CHAR O ? T= Value Submit Provide Feedback <Ch 11 Assignment Vapor Pressure The vapor pressure of a substance describes how readily molecules at the surface of the substance enter the gaseous phase. At the boiling point of a liquid, the liquid's vapor pressure is equal to or greater than...
heat transfer project - i need help to see what direction you
would take this problem in order to make the design.
Design a counter-flow, concentric-tube heat exchanger to use water forc al power station. The mass flow rate of the oil is given as 0.2 kg/s, and its inlet emperature is 90°C. The water is available at 20°C, but its temperature rise is restricted to 12.5°C of environmental concerns. The outer tube diameter must be less than 5 cm,...
you can skip task 1 (3) because its a code in
matlab.
Task 1: You were asked to check up the status of the water system. Water at 24 °C is to be pumped from a Lower reservoir with 100 m elevation to another reservoir at a higher elevation 112 m through 150-m-long pipe as shown in Figure (1). The pipe is made of steel, and the diameter ofthe pipe is equal to 30 cm water is to be pumped...
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