Elements emit colours when heated because electrons in atoms can have only certain allowed energies.Heating an atom excites its electrons and they jump to higher energy levels. When the electrons return to lower energy levels, they emit energy in the form of light. Every element has a different number of electrons and a different set of energy levels. Thus, each element emits its own set of colours. See, for example, mercury and neon above. Those colours are as distinctive to each element as fingerprints are to people.
I would say ( b ) because they already know who she is so when you point to your right they’ll know you’re talking about Kathy
The answer is, A. seafloor spreading occurs
Lipids is not a real word bc it’s not i looked it up on wiki how
Of course it's possible, because it means that sintheta=-2/5 which satisfies this -1<=sintheta<=1