Which illustrates different states of a substance? oxygen and nitrogen

sugar and water

limestone and crushed limestone

ice and water vapor

Determine the maximum r-value of the polar equation r =3+3 cos 0

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?

Could we see a galaxy that is 20 billion light-years away?