A student marks his starting point on a grassy field. He then makes three moves: 20 m east, 40 m north, and 80 m west. Where is his final position relative to his starting point? a 60 m east and 40 m north b 40 m west and 60 m north c 60 m east and 40 m south d 60 m west and 40 m north e 40 m east and 60 m south

Ms.hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.

What is the rate of change in a objects position?

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?