The Hertzsprung-Russell Diagram plots ________ against the spectral type or temperature
A) distance
B) luminosity or absolute magnitude
C) brightness or apparent magnitude
D) size or density
E) mass
B
Physics & Space Science
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In a Newtonian fluid, the plastic shear strain rate is equal to the applied shear stress divided by the _________.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
What evidence do we have that the chromosphere is hotter than the photosphere?
What will be an ideal response?
Physics & Space Science
If we can solve the orbital motion of an eclipsing binary, we can find
a. the mass of each star. b. the diameter of each star. c. the distance to the binary. d. all of the above e. both a and b
Physics & Space Science
The half-life of a muon is 2.2 ?s. How fast is it moving relative to an observer who says its half-life is 4.4 ?s?
A. 0.87c B. 0.75c C. 0.97c D. 0.72c E. 0.50c
Physics & Space Science