In the equation PV = NkT, the k is known as
A) Avogadro's number.
B) Boltzmann's constant.
C) Planck's constant.
D) the spring (compressibility) constant.
E) compressibility.
B
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If the radial velocity of a star is positive, the star is moving _________________ you
a. parallel to b. away from c. towards d. in circles around
Radioactivity Basics: Neodymium 
Nd is an isotope that undergoes alpha decay. What isotope is the product of this decay?
A. 
Ba
B. 
Ce
C. 
Pr
D. 
Sm
E. 
Gd
Which of the following situations represents a car whose speed is increasing?
A) A car covers equal distances in shorter and shorter times. B) In equal times, a car covers shorter and shorter distances. C) A car covers equal distances in equal times. D) A car takes longer and longer times to cover equal distances. E) None of the above.
Which of the following is not one of the types into which rocks are classified?
a. Igneous b. Orthoclase c. Metamorphic d. Sedimentary