The Herschels' grindstone model of the Milky Way star system was too small because
a. they did not count the brightest stars.
b. they did not study the southern sky.
c. they did not have large enough telescopes.
d. they only observed stars in the disk of the galaxy and not the halo.
e. they did not know about interstellar dust clouds.
Question 2
Convection is important in stars because it
a. increases the temperature of the star.
b. mixes the gases of the star.
c. transports energy outward in the star.
d. carries the neutrinos to the surface of the star where they can escape.
e. mixes the gases of the star and transports the energy outward in the star.
Tubal ligation. To minimize the size of the incisions necessary, laparoscopic surgery may be used to
The bicarbonate buffer system
A typical direct-injection system uses two pumps—one low-pressure electric pump in the fuel tank ...
How to solve a linear system when the variable is in the denominator position (Question 1 of 2)
The Bohr model of the atom. The nucleus contains protons and neutrons, and electrons orbit around ...
Model of the lactose operon repressor