HELP ✋‼️‼️ What happens to the domains in this iron nail when the south pole of a
magnet approaches it from the right?
A. All the arrows align to point left.
O
B. All the arrows align to point down.
C. All the arrows align to point up.
D. All the arrows align to point right.

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.

What is the role of the ocular lens?

The consumption of fossil fuels could be