The star Wolf 1061 has a parallax of 2.34 arcseconds, while the star Ross 652 has a parallax of 1.70 arcseconds. What can you correctly conclude?
A) Both stars are outside the Milky Way galaxy.
B) Wolf 1061 must have a larger proper motion than Ross 652.
C) Ross 652 must have a larger proper motion than Wolf 1061.
D) Ross 652 is closer to Earth than Wolf 1061.
E) Wolf 1061 is closer to Earth than Ross 652.
E
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When a standing wave occurs on a string,
1.all points along the string move up and down equal distances. 2.all points along the string move up and down, but some move more than others. 3.many points along the string move up and down, some move more than others, and some are stationary. 4.all points along the string are completely stationary because the waves from each direction cancel each other out.
Why would a hotter star appear blue-white while a cooler star appear red or not be visible at all?
What will be an ideal response?
The speed of light in a certain type of glass is 30% slower than the speed of light in air. What is the index of refraction for that type of plastic?
A. 1.43 B. 1.67 C. 1.33 D. 1.5
Graphical Analysis: The figure shows a graph of the velocity of an object as a function of time. What is the displacement of the object from 0 s to 8.0 s?
A. 20 m B. 40 m C. 60 m D. 80 m E. 100 m