PLEASE HELPPP ASAP, I'LL GIVE BRAINLEST​

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

What part of the ear is names after tools, such as the hammer and the anvil?

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?