Asample that is 2 cm thick is inserted into one arm of a michelson interferometer that was adjusted to give a maximum reading. the maximum is reestablished when the mirror is pushed 1.9 cm closer to the beamsplitter. what is the index of refraction of the sample?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

The consumption of fossil fuels could be

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)