Suppose the Hubble constant turned out to be 130 km/sec/Mpc and not 65 km/sec/Mpc. How would that affect our estimate of the age of the Universe?
A. The Universe would be about 7 billion yrs old.
B. The Universe would be about 30 billion yrs old.
C. It would have no effect on our estimates of the Universe's age.
D. The Universe would be about 130 billion yrs old.
E. None of these choices is correct.
Answer: A
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Resolution: The world's largest refracting telescope is operated at the Yerkes Observatory in Wisconsin. It has an objective lens of diameter of 1.02 m. Suppose such an instrument were mounted on a satellite at an elevation of 300 km above the ground and used to map surface details. If the telescope is forming images with light of wavelength 550 nm, what is the minimum separation of two objects on the ground whose separation could be clearly resolved by this lens?
Fill in the blank(s) with the appropriate word(s).
Which of the following best describes the predominant scientific view of the origin of life on Earth?
A) We may never know precisely how life arose, but current evidence suggests that life probably can arise naturally under the conditions that prevailed on the early Earth. B) Life probably migrated to Earth from some other world. C) Life arose through a series of extremely unlikely chemical coincidences, making it seem almost miraculous that life ever came to exist at all. D) We can describe with great certainty the precise steps by which life arose on Earth.
X-rays from astronomical objects can only be detected from telescopes in space
Indicate whether the statement is true or false
Light from an astronomical source is found to be shifted to a one percent lower frequency than had the source been at rest. What radial velocity could cause such a shift?
A. 
m/s moving away from the observer
B. 
m/s moving away from the observer
C. 
m/s moving toward the observer
D. 
m/s moving toward the observer
E. 
m/s moving away from the observer