A laser has a frequency of 5.45x1015 Hz as it travels through a vacuum. What is the wavelength? 5.50x10-8 m
1.82x10-21 m
1.82x107​​​​​​ m
5.50x1022​​​​​ m

Describe the path of the electric current through a circuit?

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 are igneous intrusions and extrusions