Physics, 22.03.2021 22:00 EternalRose1121
You sit in the center of a room that includes an amazing surround-sound system, consisting of 10 speakers (all of which are equidistant from your ears). You play a tone from all 10 speakers at once, but they have randomly-distributed relative phases, so you hear the same volume as if you turned up the power coming through a single speaker by a factor of 10. From this arrangement you hear the tone at an intensity level of . Next you reconfigure the speakers so that they play the tones in phase. If the volume of each speaker is the same as before, what is the decibel level of this new sound
Answers: 3
Physics, 22.06.2019 12:50
Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.
Answers: 2
Physics, 23.06.2019 11:30
Which of the following characteristics of earth's relationship to the sun explains the existence of earth's seasons? choose all that apply. earth has a satellite called the moon, which rotates around earth. earth spins on its axis, completing one rotation each day. earth's axis always points in the same direction relative to the stars. earth's axis is tilted relative to its orbital plane. earth orbits around the sun, completing one orbit each year.
Answers: 1
You sit in the center of a room that includes an amazing surround-sound system, consisting of 10 spe...
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