Ancient coal beds can be found in Antarctica because
A) at one time the climate of Antarctica was mild enough to support swamplands.
B) ancient coal beds were frozen in the Antarctic ice.
C) it used to be located in the northern hemisphere.
D) it was located at the equator during the Carboniferous period.
Answer: A
You might also like to view...
Entropy: What is the entropy change of 450 g of water when it changes from (a) liquid to steam at its usual boiling point and (b) ice to liquid at its usual melting point? For water, LF = 0.334 MJ/kg, LV = 2.26 MJ/kg.
What will be an ideal response?
The surface of Mercury resembles the Moon's surface in that they are both ________.
A. covered with volcanoes B. eroded by wind C. heavily cratered D. newly resurfaced
Stars X and Y have the same luminosity, but star Y is 10 times as far from Earth as star X. How much brighter will star X appear in our sky than star Y?
A) 10 times B) 100 times C) 1000 times D) 10,000 times E) 100,000 times
Two identical particles, each with a mass of 4.5 ?g and a charge of 30 nC, are moving directly toward each other with equal speeds of 4.0 m/s at an instant when the distance separating the two is equal to 25 cm. How far apart will they be when closest to one another?
a. 9.8 cm b. 12 cm c. 7.8 cm d. 15 cm e. 20 cm