Which of the following would be the most useful ultraviolet telescope?
A) a 2.5-meter telescope in space
B) a 30-meter telescope on a mountain
C) a 1-meter telescope in space
D) a 10-meter telescope on a mountain
A) a 2.5-meter telescope in space
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how much of the initial mass of a star is lost by the time it completes the triple alpha process?
What will be an ideal response?
An 800-N billboard worker stands on a 4.0-m scaffold supported by vertical ropes at each end. If the scaffold weighs 500 N and the worker stands 1.0 m from one end, what is the tension in the rope farthest from the worker?
a. 450 N c. 800 N b. 500 N d. 850 N
Considering only the role of dark matter and keeping all other factors the same, which hypothetical universe is oldest?
A) the one with more dark matter B) the one with less dark matter C) Dark matter doesn't affect the inferred age of the universe.
The energy of a photon is ______________ proportional to its wavelength
Fill in the blank(s) with correct word