Physics, 17.09.2019 20:20 arroyoe342
Party hearing. as the number of people at a party increases, you must raise your voice for a listener to hear you against the background noise of the other partygoers. however, once you reach the level of yelling, the only way you can be heard is if you move closer to your listener, into the listener’s "personal space." model the situation by replacing you with an isotropic point source of fixed power p and replacing your listener with a point that absorbs part of your sound waves. these points are initially separated by ri = 1.20 m. if the background noise increases by δβ = 5 db, the sound level at your listener must also increase. what separation rf is then required?
Answers: 3
Physics, 21.06.2019 16:30
In which scenario is the least amount of work done on a crate? a force of 120 n moves it 25 m. a force of 115 n moves it 26 m. a force of 130 n moves it 22 m. a force of 125 n moves it 27 m.
Answers: 1
Physics, 21.06.2019 21:20
Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above
Answers: 3
Physics, 22.06.2019 16:30
Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?
Answers: 2
Party hearing. as the number of people at a party increases, you must raise your voice for a listene...
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