The pregalactic blobs had masses similar to
A) dwarf galaxies.
B) the Sun.
C) the Earth.
D) the Milky Way.
E) open clusters of stars.
A
You might also like to view...
Quasars ____
a. are common at all ages of the Universe b. are the early stages of what become Seyfert galaxies c. disrupt galactic formation and become isolated black holes d. are an early stage of the formation of common galaxies e. are formed from double-lobed radio galaxies
An aquarium contains a 5-cm layer of water (n = 1.33) floating on top of carbon tetrachloride (n = 1.461). If the angle of incidence into the water from the air is 30°, what is the angle of refraction into the carbon tetrachloride?
a. 58° b. 69° c. 37° d. 20° e. 75°
Active galaxies are believed to be the product of collisions and interactions because ____
a. they are always seen in contact with another galaxy b. the transfer of matter would explain the black hole eruption c. the collision of individual stars would explain the black hole eruption d. central bulges are formed by collisions e. supermassive black holes are necessary for galactic collisions
A velocity selector uses a fixed electric field of magnitude E and the magnetic field is varied to select particles of various energies. If a magnetic field of magnitude B is used to select a particle of a certain energy and mass, what magnitude of magnetic field is needed to select a particle of equal mass but twice the energy?
A. 0.50 B B. 1.4 B C. 2.0 B D. 0.71 B E. 1.7 B