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The diagram below shows the positions of the Earth and Sun during different times of the Earth year. Each position represents the first day of a particular season.

Use the labels to correctly identify the season that the Northern Hemisphere is beginning to experience in each position.

labels choices- fall, summer, winter, spring

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

Place me with this question is my last question

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?