Convection is a mode of energy transport between materials that requires close contact between the atoms
Indicate whether the statement is true or false
False
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Proportional Reasoning: In the absence of air resistance, a ball is thrown vertically upward with initial speed v. An identical ball is thrown upward with initial speed 2v. If the first ball reaches a maximum height h, what maximum height will the second ball reach?
A. 8h
B. 4h
C. 2h
D. 
h
E. h
The strong tendency of certain minerals to break along smooth, parallel planes is known as ________.
Fill in the blank(s) with the appropriate word(s).
Some quasars show absorption spectra with a smaller redshift than their emission spectra. This indicates that
A) they are much closer than previously thought. B) there is cooler gas between us and the quasar. C) we still don't understand redshifts. D) their black holes are still contracting. E) their black holes are still expanding.
The Jurassic is a(n)
a. epoch. b. era. c. eon. d. period.