Suppose that an ancient civilization had built a stone structure 6000 years ago to point towards a bright star as it rose
Would that structure still point at that star today? If not, why not, and what information would archaeoastronomers need to figure out which star the structure pointed at?
Because of the precession of Earth's axis, the structure would no longer point at the original star's rising location. However, if scientists could determine the age of the structure, they could determine which stars had risen along the direction the structure pointed.
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Explain why it would be better to obtain stellar parallax for stars if we could observe from the planet Mars instead of the Earth
What will be an ideal response?
The natural frequencies for a stretched string of length L, and wave speed v, are Nv/(2L) where N equals
A) 0, 1, 2, 3, ... B) 2, 4, 6, 8, ... C) 1, 2, 3, 4, ... D) 0, 1, 3, 5, ... E) 1, 3, 4, 5, ...
A 0.5-kg blob of clay moving at 2.0 m/s slams into a 4.0-kg blob of clay at rest. The speed of the two blobs stuck together after colliding is about
A) 1.1 m/s. B) 1.5 m/s. C) 2.5 m/s. D) none of the above
A monkey hangs on a rope. What forces act on the monkey? (Ignore forces due to the air.)
1.Friction, Gravitation 2.Tension, Gravitation 3.Friction, Tension, Gravitation 4.Normal, Friction, Gravitation 5.More than one answer is true 6.None of the above 7.Cannot be determined