What shape are moons?
a. nearly spherical
b. large ones are spherical; small ones are irregular
c. small ones are spherical; large ones are irregular
d. Earth’s and Jupiter’s moons are spherical; Uranus’s and Neptune’s are not
Answer: b. large ones are spherical; small ones are irregular
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Fissioning an iron nucleus would occur with
A) absorption of energy. B) release of energy. C) neither absorption nor release of energy
If the net force acting on an object is in the positive x-direction, the object moves only in the positive x-direction
1.True 2.False
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
Fluid Flow: Water flows out of a large reservoir through an open pipe, as shown in the figure. What is the speed of the water as it comes out of the pipe?
A. 8.9 m/s B. 9.9 m/s C. 13 m/s D. 14 m/s E. 16 m/s