The diagram below illustrates the layout and light path of a reflecting telescope of the ____________________ design
Fill in the blank(s) with correct word
Cassegrain
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What are the four fundamental forces in the Universe and how did they affect the first steps of the big bang and the inflation of the Universe?
What will be an ideal response?
One way that future space stations may create artificial gravity is by rotating the station. Consider a cylindrical space station 380 m in diameter that is rotating about its longitudinal axis
Astronauts walk on the inside surface of the space station. How long will it take for each rotation of the cylinder if it is to provide "normal" gravity for the astronauts? A) 6.2 s B) 28 s C) 4.4 s D) 39 s
One situation in which the law of conservation of energy is violated is
A) near black holes. B) for very fast-moving objects. C) for atomic-sized objects. D) All of the above. E) nonsense--no violations of this law have ever been observed.
On the average, in a ferromagnetic domain permanent atomic magnetic moments are aligned ____ to one another
a. antiparallel b. parallel c. perpendicular d. alternately parallel and antiparallel e. randomly relative