What is the sound frequency of the gas turbines in a generation station? How much (electric)...
What is the sound frequency of the gas turbines in a generation station? How much (electric) power can we expect from it?
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What is the sound frequency of the gas turbines in a generation
station? How much (electric)...
Three different turbines are installed in the room of a power station. The noise levels of...
Three different turbines are installed in the room of a power station. The noise levels of each, measured individually at the operator's station were 85, 92 and 91 dB, respectively. What is the sound pressure level at the operator's station with all three turbines operating? 4.
Problem 1 (Marks 3) Smithfield power station in NSW, Australia operates on 4 gas turbines. Each of the gas turbine unit...
Problem 1 (Marks 3) Smithfield power station in NSW, Australia operates on 4 gas turbines. Each of the gas turbine unit operates on the regenerative Brayton Cycle between the pressure limits of 100 kPa and 700 kPa. Air enters the compressor at 30°C at a rate of 12.6 kg/s and leaves at 260°C. It is then heated in a regenerator to 400°C by hot combustion gases leaving the turbine. Diesel fuel with heating value of 42,000 kJ/kg is burned in...
Problems 1. What is the speed of sound at 35 °C? 2. What is the frequency...
Problems 1. What is the speed of sound at 35 °C? 2. What is the frequency of a sound, whose wavelength is 0.520m, at 40 °C? 3. How much stronger is the intensity of a sound from a speaker at a distance of 10m compared to 30m? Assume a spherical sound wave. 4. What is the ratio of the intensities of a spherical sound wave at 15m and 25m from the source?
A train: A enters a train station with constant speed of .00 m/s while another train...
A train: A enters a train station with constant speed of .00 m/s while another train B leaves the train station with constant speed of 4.00 m/s. At a moment they are both at the same distance of 1 km from the train station they whistle two identical sounds of 400. Hz with acoustic power of 70.0 W each. A passenger standing on the station platform. No wind is blowing. (a) What is the frequency of the sound from A...
31B. Radio station KDKA in Pittsburgh broadcasts at a frequency of 1020 kHz. At 10 km away, the e...
31B. Radio station KDKA in Pittsburgh broadcasts at a frequency of 1020 kHz. At 10 km away, the electric field has a magnitude of 0.245 N/C. (a) What is the magnitude of the magnetic field? (b) What is the magnitude of the Poynting vector? (c) What is the power?
31B. Radio station KDKA in Pittsburgh broadcasts at a frequency of 1020 kHz. At 10 km away, the electric field has a magnitude of 0.245 N/C. (a) What is the magnitude...
1.In practice, steam and gas turbines are heavily insulated. What is the effect of insulating a...
1.In practice, steam and gas turbines are heavily insulated. What is the effect of insulating a turbine on the turbine power output when the steam mass flow rate, inlet and outlet conditions are fixed? Your qualitative explanation must refer to the steady flow energy equation. 2.For a specified turbine power output with fixed inlet and outlet conditions, explain what happens to the steam mass flow rate when a turbine is insulated.
High-frequency sound waves exhibit less diffraction than low-frequency sound waves do. However, even high frequency sound...
High-frequency sound waves exhibit less diffraction than low-frequency sound waves do. However, even high frequency sound waves exhibit much more diffraction under normal circumstances than do light waves that pass through the same opening. The highest frequency that a healthy ear can typically hear is 2.0 × 104 Hz. Assume that a sound wave with this frequency travels at 342 m/s and passes through a doorway that has a width of 1.2 m. (a) Determine the angle that locates the...
spent steam from an electric generating plant leaves the turbines at 120.0 C and is cooled to 90
spent steam from an electric generating plant leaves the turbines at 120.0 C and is cooled to 90. 0 C liquid water by water from a cooling tower in a heat exchanger. How much heat is removed by the cooling tower water for each kg of spent steam?
A radio station transmits isotropically (i.e. in all directions) electromagnetic radiation at the frequency of 98.2...
A radio station transmits isotropically (i.e. in all directions) electromagnetic radiation at the frequency of 98.2 MHz. At a certain distance from the radial station the wave intensity is I = 0.295 W / m ^ 2. a) What will be the intensity of the wave three times the distance of the radial station? b) What is the wavelength of the transmitted signal. c) If the antenna power is 6 MW. At what distance from the source will the wave...
An electronic point source emits sound isotropically at a frequency of 2 × 103 Hz and...
An electronic point source emits sound isotropically at a frequency of 2 × 103 Hz and a power of 27 watts. A small microphone has an area of 0.77 cm2 and is located 175 meters from the point source. a: How many minutes will it take for the microphone to recieve 0.2 Joules from this sound? b: What is the sound intensity level at the microphone from this point source? c: What would be the sound intensity level at the...
Three different turbines are installed in the room of a power station. The noise levels of each, measured individually at the operator's station were 85, 92 and 91 dB, respectively. What is the sound pressure level at the operator's station with all three turbines operating? 4.
Problem 1 (Marks 3) Smithfield power station in NSW, Australia operates on 4 gas turbines. Each of the gas turbine unit operates on the regenerative Brayton Cycle between the pressure limits of 100 kPa and 700 kPa. Air enters the compressor at 30°C at a rate of 12.6 kg/s and leaves at 260°C. It is then heated in a regenerator to 400°C by hot combustion gases leaving the turbine. Diesel fuel with heating value of 42,000 kJ/kg is burned in...
Problems 1. What is the speed of sound at 35 °C? 2. What is the frequency of a sound, whose wavelength is 0.520m, at 40 °C? 3. How much stronger is the intensity of a sound from a speaker at a distance of 10m compared to 30m? Assume a spherical sound wave. 4. What is the ratio of the intensities of a spherical sound wave at 15m and 25m from the source?
A train: A enters a train station with constant speed of .00 m/s while another train B leaves the train station with constant speed of 4.00 m/s. At a moment they are both at the same distance of 1 km from the train station they whistle two identical sounds of 400. Hz with acoustic power of 70.0 W each. A passenger standing on the station platform. No wind is blowing. (a) What is the frequency of the sound from A...
31B. Radio station KDKA in Pittsburgh broadcasts at a frequency of 1020 kHz. At 10 km away, the electric field has a magnitude of 0.245 N/C. (a) What is the magnitude of the magnetic field? (b) What is the magnitude of the Poynting vector? (c) What is the power?
31B. Radio station KDKA in Pittsburgh broadcasts at a frequency of 1020 kHz. At 10 km away, the electric field has a magnitude of 0.245 N/C. (a) What is the magnitude...
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