Radioactivity Basics: What is the mass number of alpha particles?
A. 1
B. 2
C. 3
D. 4
E. 6
Answer: D
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If we see two objects that have different colors, the light waves coming from them have different ____________
Fill in the blank(s) with correct word
The requirement of liquid water is the most severe constraint on the development of life
Indicate whether the statement is true or false
A constant net force acts on an object. Describe the motion of the object
A) constant non-zero velocity. B) constant non-zero acceleration. C) increasing acceleration. D) decreasing acceleration. E) zero acceleration.
A variable resistor is connected to a constant voltage source. When the resistance is increased from 5.5 
to 9.3
what happens to the power dissipated?
A. no change B. a 35% decrease C. a 41% decrease D. a 59% decrease E. a 69% decrease