The pressure at what depth in seawater 
is equivalent to that at a depth of 10.0 m in fresh water 
A. 10.2 m
B. 9.8 m
C. 10.3 m
D. 9.7 m
B. 9.8 m
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A cannonball fired from a long-barrel cannon will have a greater muzzle velocity because the cannonball receives a greater
A) force. B) impulse. C) both of these D) none of the above
How do observations of galaxies at different distances help us learn about galaxy evolution?
A) Observations of different distances show galaxies of different ages and therefore different stages of evolution. B) Observations of the most distant galaxies will allow us to observe the birth of galaxies. C) We can observe galaxies at different distances merge, helping us learn how mergers affect evolution. D) We can observe the evolution of a single galaxy over time. E) We can see what our galaxy used to look like over time, helping us theorize about the physical processes that led to its current appearance.
Which feature of this plot indicates that the neutrino has a very small rest mass?
a. The location of the peak near a kinetic energy of 0.2. b. The overall slope between the peak and the maximum kinetic energy. c. The value of the maximum kinetic energy. d. The brief upward slope initially of the curve. e. The absence of any events for large values of the kinetic energy.
According to current astronomical data, approximately how old is the universe?
A) 65 million years B) 6000 years C) 4.6 billion years D) 14 billion years