Which hemisphere on Mars is believed to be older, and what is the evidence?
What will be an ideal response?
The southern hemisphere is older and higher in elevation, since it has more impact craters, while the northern shows more recent volcanism and lava flows, and even ocean basins over much of the low region near the north pole.
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Black holes emit radiation in the form of ________ waves known as Hawking radiation.
A. gravitational B. nuclear C. seismic D. electromagnetic
Special relativity says that c, the speed of light, is the maximum velocity for both matter and energy in our universe
Indicate whether the statement is true or false
If the polarizing angle (the angle at which reflected light is completely plane polarized) of a flat piece of sapphire is 60.5°, what is its index of refraction?
a. 1.97 b. 1.77 c. 1.59 d. 2.36 e. 1.82
The tension in a string from which a 4.0-kg object is suspended in an elevator is equal to 44 N. What is the acceleration of the elevator?
a. 11 m/s2 upward b. 1.2 m/s2 upward c. 1.2 m/s2 downward d. 10 m/s2 upward e. 2.4 m/s2 downward