An electron gun sends electrons through a region with an electric field of 
for a distance of 2.5 cm. What is the acceleration of the electrons while in this electric field?
a. 
b. 
c. 
d. 
e. 
d.
Physics & Space Science
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When current reverses direction in a wire, the surrounding magnetic field
A) also reverses direction. B) becomes momentarily stronger. C) contracts. D) expands.
Physics & Space Science
A reasonable estimate for the height of the walls in an ordinary American home is
A) 10 m. B) 8 m. C) 2.5 m. D) 1.5 m.
Physics & Space Science
A(n) _________material has a small positive magnetic susceptibility that approaches zero at zero kelvin, increases with increasing temperature, reaches a maximum, and then is paramagnetic with further increases in temperature.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
At the root of the tree of life
A) is the common ancestor of all life on Earth B) is the common ancestor of all mammals C) are viruses D) are human beings
Physics & Space Science