What part of the Sun's aging process will disrupt the biosphere and evaporate the oceans of Earth?
a. the fusion of hydrogen in the core
b. an increase in luminosity as the core becomes helium-enriched
c. the expansion of the outer layers of the Sun as a red giant
d. the supernova explosion caused by the collapse of the iron core
e. hydrogen detonation on the white dwarf remnant
b
You might also like to view...
Which stars in globular clusters are believed to be examples of mergers?
A) brown dwarfs B) eclipsing binaries C) blue stragglers D) blue supergiants E) planetary nebulae cores
A transverse periodic wave is represented by the equation y(x, t) = 2.50 cm cos(2,500 rad/s t - 15.0
x). What is the k vector of the wave?
A. 15.0 
in the - x direction
B. 15.0 in the + x direction
C. 30.0 in the + y direction
D. 30.0 in the - y direction
E. 45.0
in the + x direction
Which of the following deformation processes is best suited to producing automobile engine piston rods?
(a) Rolling (b) Extrusion (c) Drawing (d) Forging
The headlights, radio, and defroster fan in an automobile are connected in
A) series. B) parallel. C) order of energy efficiency.