Which of the following statements is true of medium-mass stars?
A) They never ignite their hydrogen shells and cannot become giant stars.
B) They have interiors that are completely mixed by convection.
C) In such stars, the helium ash accumulates in an inert helium core surrounded by unprocessed hydrogen.
D) During red giant stages, these stars tend to gain mass due to strong stellar winds.
C
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Mass 30.0 g is located at the origin. Where is mass 10.0 g located if the coordinates of the center of mass are (0.00 cm, 10.0 cm)?
A. (0.00 cm, 20.0 cm) B. (0.00 cm, 5.00 cm) C. (0.00 cm, 7.50 cm)
The Surface Weather map presents data and analysis for what time of day?
Diffraction Gratings: A diffraction grating with 396 lines/mm is illuminated with light of wavelength 343 nm. What is the angular separation between the two second-order bright fringes?
A. 31.5° B. 15.8° C. 32.9°
If you add two vectors with magnitudes of 200 and 40, which of the following is the only possible resultant?
A. 100 B. 260 C. 0 D. 200 E. 40