Describe the distance and composition of the Alpha Centauri system
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The Alpha Centauri system is composed of three stars. This system includes the closest star to Earth (other than the Sun). The closest star is called Proxima Centauri and has a parallax of 0.77 arc second which is 1.3 pc or 4.3 light-years.
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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
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A woman walks briskly at 2.0 m/s how much wile will it take her to walk one mile?
A. 8.3 min B. 13.4 min C. 21.7 min D. 30.0 Min
A violin with string length 32 cm and string density 1.5 g/cm resonates with the first overtone from a 2.0-m long organ pipe with one end closed and the other end open. What is the tension in the string?
A) 1000 N B) 110 N C) 450 N D) 4100 N E) 56 N
The resolving power of a telescope is affected by the property of light called
A. refraction. B. attenuation. C. diffraction. D. reflection. E. seeing.