What does the universe look like on very large scales?
A) Galaxies are uniformly distributed.
B) Galaxies are randomly distributed.
C) Galaxies are distributed in a hierarchy of clusters, superclusters, and hyperclusters.
D) Galaxies appear to be distributed in chains and sheets that surround great voids.
E) Galaxies are distributed in a great shell expanding outward from the center of the universe.
D
You might also like to view...
A parallel plate capacitor has a paper dielectric having dielectric strength 8.0 kV/mm and dielectric constant 3.0. The plate area is 3000 cm2 and the plate separation is 0.50 mm. What is the capacitance?
A. 16 nC B. 4.2 nC C. 5.3 nC D. 1.6 nC E. 4.2 pdf
What is the very first step of the scientific method? a. Design an experiment. b. Form a hypothesis
c. Analyze results. d. Generate a conclusion. e. Perform an experiment.
The mass density of normal air is, at 293 K,
and the average molecular mass of air is 29.0 u. If the mean free path of an air molecule at room temperature is measured to be 111 nm, what is the average diameter of an air molecule.
A. 0.31nm B. 0.26nm C. 0.28nm D. 0.49nm E. 0.56nm F. 0.23nm
A charged particle is moving with speed v perpendicular to a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendicular to the same magnetic field
If the frequency of revolution of the first particle is f, the frequency of revolution of the second particle is A) f. B) 4f. C) 2f. D) f/2. E) f/4.