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A) In which environment does sound spread faster? Is it in cool weather? Is it warm air?
B) Does the Mach number of a gas flowing at a constant speed remain constant?
C) Is it possible to accelerate a gas to supersonic velocity in a converging nozzle?
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- Question - Determine the transmission paths of sound, from building services systems, through different forms of structureWater from a reservoir flowing through a non rigid 600mm diameter pipe with a velocity of 2.90m/s is completely stopped by a closure of a valve situated 1050m from the reservoir. The pipe thickness is 18mm. Bulk modulus of elasticity of water is 2090MPa and modulus of elasticity of steel is 200090MPa. Compute the velocity of soundwave 1425.90 1524.09 1245.09 1952.09 Determine the pressure due to instantaneous closure (KPa) 3106.75 1360.57 3610.75 6301.57 Determine the pressure due to a closure that takes place in 5 seconds. in KPa 1821 1218 1128 1812The speed of the air passing through a pipe with a small diameter section of 10 cm2 is 4.12m / s. Tube section 26 cm2 what is the air speed when magnified?
- Using a sound meter, the following measurements were made for the following sources: rock band at a concert (100 ×106 μPa), a jackhammer (2 x 106 μPa) , and a whisper (2000 μPa).Water from a reservoir flowing through a non rigid 600mm diameter pipe with a velocity of 2.m/s is completely stopped by a closure of a valve situated 1050m from the reservoir. The pipe thickness is 18mm. Bulk modulus of elasticity of water is 2000MPa and modulus of elasticity of steel is 200000MPa. A.) Compute the velocity of soundwave Choices: 1724.47 1442.47 1224.74 2441.74 B.) Determine the pressure due to instantaneous closure (KPa) Choices: 2449.49 4229.94 2994.94 4922.49 C.)Determine the pressure due to a closure that takes place in 5 seconds. in KPa Choices: 408 804 840 480 Note:please help me in the sample problem and please base ypur answer on the given choices thank youBall A is released from rest at height 85m at the same time that a second ball B is thrown upward from a distance 2m above the ground. If the balls pass one another at a height 25m.(a) Determine the speed at which ballB was thrown upward. (b) Determine the speed of ball Bwhen the balls pass one another (c) Determine the total time of travel when the balls pass one another. acceleration due to gravity = 9.81m/s2
- In the aviation industry what problems are faced when switching to new operating systems?A marble is rolling on the top of a levelled first floor of an open building which is 3.70m from the ground, and subsequently passes through a vertical window opening with a height "h". The bottom of the window is located at a distance "h" from the ground. Calculate the distance from the edge of the building to the window which will allow the landing zone for the marble to have a width "h". Determine also the range of velocity that will allow the projectile to pass through the opening. Use h = 1.35 mSubject - Determine the effects of sound and vibration related to building services and human comfort Question - Explain the principles of sound and vibration on room acoustics and their impact on human hearing
- True or False Nicola Tesla's vision for the wireless transmission of electrical power over invisible airwaves, has already been achieved for thousands of square feet of office space, in Singapore's downtown.For the beam deflection / beam bending experiment 1a- Briefly state the engineering research problem being addressed. 1b-Briefly explain how the experiment addresses the research problem. In a short parag 1c-State and explain the equations used and the key principles behind them in a short paragraphDoes a typical microwave oven utilize feedback controlto set the cooking temperature or to determine if the food is“cooked”? If not, what technique is used? Can you think ofany disadvantages to this approach, for example, in thawing and cooking foods?