Fourier analysis of a particular spectrum includes the harmonic frequencies 1113 hz , 1431 hz , and 1590 hz . part a what is the fundamental frequency f1, assuming that f1 > 100 hz?

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

What is the role of lenses in microscopy?