What is a possible reason why Venus does not have plate tectonics?
A) it is too small
B) its crust is too dry and stiff to break into plates
C) it has no partially molten iron core
D) Both A and B
D
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If the atoms are in irregular arrangements, the material is ______________.
Fill in the blank(s) with the appropriate word(s).
A planet is discovered to orbit around a star in the galaxy Andromeda, with the same orbital diameter as the Earth around our sun
If that star has 4 times the mass of our sun, what will the period of revolution of that new planet be, compared to the Earth's orbital period? A) four times as much B) one-half as much C) one-fourth as much D) twice as much E) times as much
A car starts from rest and accelerates uniformly at 3.0 m/s2 toward the north. A second car starts from rest 6.0 s later at the same point and accelerates uniformly at 5.0 m/s2 toward the north
How long after the second car starts does it overtake the first car? A) 12 s B) 19 s C) 21 s D) 24 s
How does friction affect energy transformations?