Which of the following happens when a star runs out of hydrogen at its center?
A) The core of the star expands.
B) The outer layers of the star heat up.
C) The star moves toward the lower left in the Hertzsprung-Russell diagram.
D) The stellar core becomes almost pure helium
D
You might also like to view...
In an H-R diagram, stars with the smallest radius are found in the _________ of the diagram
a. center b. upper left corner c. upper right corner d. lower left corner e. lower right corner
At solar noon on the summer solstice, the Sun is located ________.
A. 23.5 degrees above the horizon B. 23.5 degrees below the Celestial Equator C. 23.5 degrees above the ecliptic D. 23.5 degrees above the Celestial Equator E. 23.5 degrees below the ecliptic
Three devices that use electromagnetic induction in their operation are __________, __________, and __________
Fill in the blank(s) with correct word
In a Compton scattering experiment, the scattered photon has a wavelength of 6.55 pm. If the scattering angle is 
what is the wavelength of the incident photon?
A. 5.68 pm B. 7.42 pm C. 3.28 pm D. 0.868 pm E. 2.43 pm