You have a pair of horizontal parallel plates, with the positive plate above and the negative plate below. How will the lines of constant potential be arranged in this perspective?
A. Horizontally
B. Spherically, since all charges are either electrons or protons
C. Vertically
Answer: A
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Potential: A proton that is initially at rest is accelerated through an electric potential difference of magnitude 500 V. What speed does the proton gain? (e = 1.60 × 10-19 C , mproton = 1.67 × 10-27 kg)
A. 2.2 × 105 m/s B. 3.1 × 105 m/s C. 9.6 × 105 m/s D. 1.1 × 105 m/s
How does the spectrum of a star depend on its surface temperature?
A. The cooler the star, the more molecular absorption bands will be present in its spectrum. B. Hot stars and cool stars can both have weak hydrogen lines. C. The hotter the star, the more colors will be present in its continuous spectrum. D. All of these choices are correct. E. None of these choices are correct.
There are more giant elliptical than dwarf galaxies
Indicate whether the statement is true or false
What is the net force inward acting on a spherical bathysphere of diameter 2.00 m at an ocean depth of 1000 m? (The pressure inside the bathysphere is, hopefully, 1 atm.) ?sea water = 1.02 × 103 kg/m3.
A. 1.26 × 104 N B. 1.26 × 106 N C. 1.26 × 108 N D. 1.26 × 1010 N E. 1.26 × 102 N