Write down optical phonon modes for caf2(3 atoms per unit cell) explain physical significance of ionic radii.

It is may 5 and you are somewhere in the northern hemisphere. if you determine that the noon sun is 51 degrees above your southern horizon, what is the latitude of your location

How do the kidneys affect homeostasis

An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?