The diagram below is an H-R diagram. The line indicates the location of the main sequence. Which of the five labeled locations on the H-R diagram indicates a luminosity and temperature similar to that of a T Tauri star?
a. 1
b. 2
c. 3
d. 4
e. 5
D
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A stature that is 3.0 cm tall statue is 24 cm in front of a concave mirror. The magnitude of the radius of curvature of the mirror is 20 cm
(a) Is the image real or virtual? (b) How far is the image from the mirror? (c) Is the image upright or inverted? (d) How tall is the image?
Which book was authored by Copernicus that explained the Sun as the center of a planetary system?
a. Alfonsine Tables b. De Revolutionibus c. Stderreus Nunctus d. The Prutenie Tables e. The Forerunner of the Universe, Containing the Mystery of the Universe
The Sun's declination on June 21st is
A) +23.5 degrees. B) 0 degrees. C) -23.5 degrees. D) different depending on where you are on Earth.
If the net flux through a closed surface is positive, then the net charge enclosed must be positive
Indicate whether the statement is true or false