The distribution of the mass of the Milky Way Galaxy is determined by
A) counting the number of stars.
B) determining the amount of gas and dust.
C) studying how stars are distributed in the Milky Way.
D) studying the rotation of the galaxy.
E) weighing various parts of the Milky Way.
D
You might also like to view...
The first telescopic photo shows what appears to be a single star. The second photo shows the same object, now revealed to be two distinct stars. What is the difference between the two photos?
A) The second photo has better (smaller) angular resolution than the first photo. B) The second photo was taken with a telescope that has greater light-collecting area. C) The second photo was taken by two telescopes rather than one. D) The second photo comes from a radio telescope, whereas the first photo comes from a visible-light photo.
Polarizing sunglasses have the transmission axis oriented ______________
Fill in the blank(s) with correct word
What does the 235 represent in uranium-235?
a. the mass number b. the atomic number c. the neutron number d. none of the above
The bottom of a flat–bottomed aluminum boat has area = 4.0 m2 and mass = 120 kg. If two fishermen and their fishing gear with total mass of 240 kg are placed in the boat, how much lower will the boat ride in the water? (water density = 1.0 × 10^3 kg/m3)
a. 0.15 m c. 0.075 m b. 0.090 m d. 0.060 m