The mass of a single galaxy might be found by
a. the double galaxy method.
b. the rotation curve method.
c. the cluster method.
d. any of the methods (i.e., double galaxy, rotation curve, cluster)
e. none of these methods.
Question 2
The pressure of a gas depends on the temperature and density of the gas.
a. True
b. False
Indicate whether the statement is true or false