The circuit is working, and all three bulbs are lit. If a switch at A is opened, what will happen to the circuit?
A. All three bulbs will stay lit.
B. All three bulbs will go out.
C. Bulb 1 will go out, but bulbs 2 and 3 will remain lit.
D. Bulbs 1 and 2 will go out, but bulb 3 will remain lit.

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.

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

What’s #16 asking me and how do i solve it?