Einstein's theory of relativity tells us that travelers who make a high-speed trip to a distant star and back will ________
A) never be able to make the trip within their lifetimes
B) age less than people who stay behind on Earth
C) age more than people who stay behind on Earth
D) have more fun than people who stay behind on Earth
B
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What is the period of a signal that has a frequency of 60 Hz?
a. 60 s c. 1/60 s b. 60 s-1 d. not determinable
This recurring event happens in the case of a binary system in which one of the companions is a neutron star.
A. X-ray bursts B. novae C. Type II supernovae D. Type I supernovae E. None of these choices is correct.
The most common molecule in a molecular cloud is:
A) methane, CH4. B) molecular hydrogen, H2. C) carbon monoxide, CO. D) water, H2O. E) ammonia, NH3.
Both the microscope and the telescope make the object appear much larger. Why are these two instruments designed differently (e.g., why are the equations for magnification quite different)?
What will be an ideal response?