As a proton moves in the direction the electric field lines
A) it is moving from low potential to high potential and gaining electric potential energy.
B) it is moving from low potential to high potential and losing electric potential energy.
C) it is moving from high potential to low potential and gaining electric potential energy.
D) it is moving from high potential to low potential and losing electric potential energy.
E) both its electric potential and electric potential energy remain constant.
D
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For a system undergoing an adiabatic process,
a. 
b. 
c. 
d. 
e. 
Graphical Analysis: The graph in the figure shows the position of a particle as it travels along the x-axis. What is the magnitude of the instantaneous velocity of the particle when t = 1.0 s?
Fill in the blank(s) with the appropriate word(s).
Which of the following temperatures is the lowest?
A. 0°F B. 0°C C. 263 K D. All of these choices are the same
Venus and Earth started out with roughly the same amount of water. While Earth still has water in abundance, all of Venus' was lost. Where did it go?
A) It chemically combined with CO2 to form H2CO3. B) Ultraviolet rays split the hydrogen from the oxygen components, and the hydrogen escaped into space. C) It all evaporated into space due to the intense daytime heat of 470°C. D) Scientists are still trying to determine this.