During the annihilation of matter and antimatter, what percentage of the mass of the colliding particles is converted into energy?
A) 0.7%
B) 0.07%
C) 70%
D) 100%
D
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Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston. If the gas temperature is 298 K, and the pressure is 1.01 × 10^6 N/m2, what is the volume? (R = 8.31 J/mol•K)
a. 9.81 × 10^-3 m3 c. 17.3 × 10^-3 m3 b. 4.90 × 10^-3 m3 d. 8.31 × 10^-3 m3
Greenhouse gases are opaque to _____
A) infrared radiation B) visible light C) ultraviolet radiation D) microwaves
In this diagram, red balls represent protons and gray balls represent neutrons. What reaction is being shown?
A) fusion of helium into carbon B) fusion of hydrogen into helium C) fusion of carbon into oxygen D) the "iron catastrophe" that initiates a supernova
If we define the gravitational field 
, where 
is a unit radial vector, then Gauss's law for gravity is
A.
.B.
.C.
.D.
.E.
.