What is an example of adding energy to a substance and causing a physical change?
mass = p + n
atomic number/mass are the same thing if i am wrong i am sorry look it up : )
the formula for converting between temperature scales is often one of the formulas printed on the inside of one of the covers of your physics text book. (why do i get the creepy feeling that i need to explain what a 'book' is now ? )
anyway, be that as it may, and it probably is, the formula to take a fahrenheit temperature and convert it to a celsius one is
°c = (5/9) x (°f - 32°)
°c = (5/9) x (125° - 32°)
°c = (5/9) x (93°)
°c = (51 and 2/3)°
it provides that whoever did it was pretty smart to grind the serial number off of the gun they used and the bullets that way a make couldnt be traced back individual i guess
there is a difference between the energy of their ground electronic state, where no electrons have been excited by an incoming photon, and their excited electronic state, where at least one electron has been moved to a higher orbital than it normally occupies. the difference between these 2 states determines how much energy they absorb when they get excited and emit when they relax (go back to their ground state). energy of light absorbed or emitted =planck's constant*frequency of light absorbed or emitted. frequency of light = speed/wavelength.