For small angle approximations
A. the angle must be 10° or less
B. the angle must be 10 radians or less
C. the angle must be 1° or less
D. the angle must be 1 radian or less
E. the angle must be 45° or less
Answer: A
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The fast rotation of neutron stars is a consequence of the law of conservation of angular momentum.
Answer the following statement true (T) or false (F)
It is unlikely that we will be able to detect the signals from civilizations in other galaxies because
A) signals from other galaxies will be severely weakened by distance, making them far harder for us to detect B) other galaxies are unlikely to harbor intelligent civilizations C) signals from civilizations on other galaxies will not reach us before we give up listening D) they will most likely transmit at wavelengths that will be absorbed by intergalactic gas
A ruby laser beam (? = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the Moon, 384,000 km away. What is the radius of the big red spot on the Moon?
A. 500 m B. 250 m C. 120 m D. 1.0 km E. 2.7 km
The spherical distribution of the globular clusters in the Halo reminds us of the similar distribution of cometary nuclei in the ________ cloud
A) Hubble B) Kepler C) Kuiper D) Oort E) Shapley