The extreme size of volcanoes on Mars indicates that
a. Mars has a much thicker crust than Earth.
b. water once flowed in streams on Mars.
c. large moving plates have not formed on Mars.
d. a and c
e. a, b, and c
D
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Second closest star to Earth
A. Solar Eclipses |
B. Alpha Centauri |
C. Proxima Centauri |
D. Lunar Eclipses |
E. Nicolas Copernicus |
F. Claudius Ptolemy |
A baseball is struck by a batter at an angle such that it reaches its maximum height at the location of the pitcher – and just grazes the top of the pitcher’s head (at an elevation of 1.50 m above the launch point of the baseball). The pitcher is a horizontal distance of 20.0 m from the point at which the ball was struck. What was the launch angle for the baseball?
a. 
b. 
c. 
d. 
e. 
f. 
1400 rev/min is equivalent to which of the following?
A) 23.3 rad/s B) 146.6 rad/s C) 8796 rad/s D) 40 rad/s
When a metal ring with a gap in the shape of the letter C is cooled, the gap becomes
A) wider. B) narrower. C) remains the same size.