Physics, 09.07.2019 05:20 katherine78
An elevator is moving downward when someone presses the emergency stop button. the elevator comes to rest a short time later. give the signs for the velocity and the acceleration of the elevator after the button has been pressed but before the elevator has stopped. enter the correct sign for the elevator's velocity and the correct sign for the elevator's acceleration, separated by a comma. for example, if you think that the velocity is positive and the acceleration is negative, then you would enter ,- . if you think that both are zero, then you would enter 0,0 .
Answers: 3
Physics, 21.06.2019 19:40
Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.
Answers: 2
Physics, 22.06.2019 12:50
The heliocentric and the geocentric models of the solar system included these central principles
Answers: 1
An elevator is moving downward when someone presses the emergency stop button. the elevator comes to...
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