Imagine that you're standing in a large room when a loud noise is made. You begin hearing a series of echoes. Which characteristic of sound best explains what just happened? A. Focusing B. Diffraction C. Diffusion D. Reverberation
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Asked 3/26/2018 10:18:49 AM
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User: Imagine that you're standing in a large room when a loud noise is made. You begin hearing a series of echoes. Which characteristic of sound best explains what just happened? A. Focusing B. Diffraction C. Diffusion D. Reverberation

Weegy: Imagine that you're standing in a large room when a loud noise is made. You begin hearing a series of echoes. The characteristic of sound that best explains what just happened is: Reverberation.
Expert answered|Score 1|alfred123|Points 126605|

User: When the temperature of the air is 50°C, the velocity of a sound wave traveling through the air is approximately A. 50 m/s. B. 361 m/s. C. 30 m/s. D. 381 m/s.

Weegy: When the temperature of the air is 50 C, the velocity of a sound wave traveling through the air is approximately 361 m/s.
Expert answered|Score 1|Malekith22|Points 1083|

User: If a wave has a wavelength of 9 meters and a period of 0.006, what is the velocity of the wave? A. 1,200 m/s B. 1,800 m/s C. 1,500 m/s D. 1,285 m/s

Weegy: If a wave has a wavelength of 9 meters and a period of 0.006, the velocity of the wave is 1500 m/s. wavelength = wave velocity / frequency ,wavelength = c / f , 9 = c/(1/ 0.006) ,c = 9 *1/0.006 = 1500 m/s

Asked 3/26/2018 10:18:49 AM
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Questions asked by Amyles1107@gmail.com
If an object has a mass of 20 kg, what is the force of gravity acting on it on earth? A. 32.67 N B. 196 N C. 1.96 kg D. 2.04 kg
Weegy: 20 * 9.789 = 195.78, rounded to 196 N. (More)
Asked 3/19/2018 7:42:01 AM
A company is interested in buying a new machine to replace their outdated equipment. However, before committing to the purchase, the company asks the manufacturer to provide data on a certain machine's efficiency. The data suggests that with a supplied energy at a rate of 1,600 W, the machine will do useful work at a rate of 1,540 W. What's the efficiency of this particular machine? A. 96.25% B. 77.00% C. 84.21% D. 103.90%
Updated 93 days ago|9/1/2020 9:48:23 PM
A company is interested in buying a new machine to replace their outdated equipment. However, before committing to the purchase, the company asks the manufacturer to provide data on a certain machine's efficiency. The data suggests that with a supplied energy at a rate of 1,600 W, the machine will do useful work at a rate of 1,540 W. The efficiency of this particular machine is 96.25% Efficiency = Output/ Input = 1540/1600 *100= 96.25%.
Added 93 days ago|9/1/2020 9:48:23 PM
This answer has been confirmed as correct and helpful.
The main difference between the internal combustion engine and the diesel engine is that the diesel engine A. has no ignition system. B. has no connecting rods. C. does not have a crankshaft. D. does not utilize pistons.
Weegy: The main difference between the internal combustion engine and the diesel engine is that the diesel engine has no ignition system. User: When heating water, during what temperature range will the temperature cease to change for some time? A. 32°C–43°C B. 98°C–102°C C. 84°C–88°C D. 54°C–62°C Weegy: When heating water, the temperature will cease during 98°C-102°C to change for some time. (More)
Asked 3/19/2018 8:18:03 AM
A silver bar 0.125 meter long is subjected to a temperature change from 200°C to 100°C. What will be the length of the bar after the temperature change? A. 0.00002363 meter B. 0.0000189 meter C. 0.124764 meter D. 0.00023635 meter
Weegy: A silver bar 0.125 meter long is subjected to a temperature change from 200°C to 100°C , the length of the bar after the temperature change is 0.124764 meter. [ Delta L = alpha * change in temperature *L0 , alpha for silver =18.8 *10^-6 per degree celcius , Delta L = 18.8 *10^-6 *(200-100)* 0.125 = 2.35 *10^-4 = 0.000235 , New length = 0.125 -0.000235 = 0.124764 meter. ] (More)
Asked 3/19/2018 8:19:26 AM
The main difference between turbojets and rocket engines is the fact that A. rocket engines are not dependent on oxygen from the air. B. turbojets carry their own supply of oxygen as oxidizers. C. rocket engines need oxygen from the air. D. turbojets are not dependent on oxygen from the air.
Weegy: The main difference between turbojets and rocket engines is the fact that rocket engines are not dependent on oxygen from the air. (More)
Updated 10/30/2018 3:46:30 PM
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