If the dark energy is described by the cosmological constant, then the _____ Universe is ____
a. open; accelerating and will not expand forever
b. flat; decelerating and will expand forever
c. closed; accelerating and will expand forever
d. open;, decelerating and will expand forever
e. flat; accelerating and will expand forever
e
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If 30 kJ of heat flows into a system and the internal energy increases by 15 kJ, then what is the work done by or on the system?
A. +85 kJ B. +65 kJ C. -65 kJ D. +15 kJ E. -15 kJ
Alfred Wegener postulated that the continents were once part of a single supercontinent that he called ______________
Fill in the blank(s) with correct word
The largest volcano on Io, Loki, is similar in size, but a bit larger than
A) Texas. B) India. C) Mauna Kea. D) Maryland. E) Manhattan.
You start with a sample of 14C that contains 200 atoms. After three half-lives, how many atoms of 14C will be left?
A. 25 B. 50 C. 75 D. 100 E. 150