One of the most fundamental discoveries about the universe has been that it is expanding. "The universe is expanding" means
A) the cosmological horizon is growing with time.
B) galaxies are growing with time.
C) distances between most galaxies are getting larger.
D) our estimate for the size of the universe has increased over the last century.
C
You might also like to view...
Fundamental Forces: The two strongest forces that act between protons in a nucleus are
A. the weak nuclear and electromagnetic forces. B. the weak nuclear and the gravitational forces. C. the electrostatic and the gravitational forces. D. the strong nuclear and the electrostatic forces.
Relativity predicts that everything in the universe is relative
A) except the laws of nature, which are absolutes B) except the speed of light, which is an absolute C) ast here are no absolutes D) except the laws of nature and the speed of light, which are absolutes
If you run a 3000-watt hair dryer for 30 minutes, how much electric energy do you consume?
A) 100 kW ? h B) 6 kW ? h C) 1.5 kW ? h D) 90,000 kW ? h E) None of the above.
An object of mass of 2.0 kg hangs from an ideal massless spring with a spring constant of 50 N/m. An oscillating force F = (4.8 N) cos[(3.0 rad/s)t] is applied to the object
What is the amplitude of the resulting oscillations? You can neglect damping. A) 2.4 m B) 0.30 m C) 0.15 m D) 1.6 m E) 0.80 m