Which statement about Population II is false?
A) The globular clusters are their most obvious groupings.
B) Their orbits around the Galaxy resemble those of comets.
C) They formed first as the Galaxy formed.
D) At almost five billion years old, our Sun must belong to this older Population.
E) They are made of almost nothing but hydrogen and helium.
D
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If an applied stress is equal in three perpendicular directions, the stress is _____________.
Fill in the blank(s) with the appropriate word(s).
The ____ of a radio telescope collects and focuses radiation
a. lens b. dish c. mirror d. antenna e. computer
The magnetic and rotational north poles on Earth are the same
Indicate whether the statement is true or false
Atoms of materials that are good conductors of electricity have
A. only electrons, and so these electrons are easily moved. B. mostly protons; thus, the negative charges jump easily from atom to atom. C. outer electrons which are loosely bound and thus easily moved. D. no electrons; thus, any that are given to them are easy to move about.