Physics, 07.10.2019 23:30 stephycake9768
Suppose a telescope has a perfect objective mirror and its resolution is limited only by diffraction. when viewing with light with a wavelength of 400 nm, what is the smallest diameter of the mirror in order to resolve two objects separated by 1.0 km on mars from the earth at a time when the earth-mars distance is 80 million kilometers? (a) 39 m(b) 390 m (c) 3.9 m (d) 3.9 km (e) 39 km
Answers: 1
Physics, 22.06.2019 03:00
Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?
Answers: 3
Physics, 22.06.2019 09:00
A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?
Answers: 1
Physics, 22.06.2019 19:30
How many electrons in an atom could have these sets of quantum numbers? =3n=3 electronselectrons =4,ℓ=2n=4,ℓ=2 electronselectrons =6,ℓ=ℓ=−1n=6,ℓ=2,mℓ=−1
Answers: 3
Physics, 23.06.2019 10:00
Humid air is a better electrical conductor than dry air. explain why you are most likely to receive a shock after walking across a carpet when the air is dry than when the air is humid.
Answers: 1
Suppose a telescope has a perfect objective mirror and its resolution is limited only by diffraction...
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