Sunspots are parts of active solar regions dominated by magnetic fields that encompass all layers of the Sun's atmosphere
a. True
b. False
Indicate whether the statement is true or false
True
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The study of fossils is called
a. cryptology. b. petrology. c. paleontology. d. historical biology.
Two masses are suspended by cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, 
has a mass of 6.0 kg and the other mass,
has a mass of 4.0 kg. The force of the cord attached to 
is
A. 47 N upward.
B. 47 N downward.
C. 33 N upward.
D. 33 N downward.
E. 15 N upward.
Potential: If the electric potential at a point in space is zero, then the electric field at that point must be
A. negative. B. zero. C. uniform. D. positive. E. impossible to determine based on the information given.
Conversion of Units: In a country where the unit of currency is the Passi, kerosene costs 130 Passi per liter, and one dollar buys 227 Passi. What is the cost of kerosene in dollars per gallon? (1.00 gal = 3.79 L)
Fill in the blank(s) with the appropriate word(s).