how do you think a device could change the sound that we hear? Make sure you use vocabulary such as frequency, energy and amplitude

What stress will shift the following equilibrium system to the left? n2(g) + 3h2(g) ⇌ 2nh3(g) adding more n2(g) adding more nh3(g) increasing the pressure of the system reducing the volume of the container

All of the following are part of the biosphere except

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.