What is the effect of grounding an (uninsulated) electrically charged conducting object?
a. The charge increases as the object gains charge from the earth, or ground.
b. The charge dissipates into the ground.
c. The ground controls the intensity.
d. The object no longer acts as a conductor.
e. The charge decreases but does not disappear, because the ground can only take some of it.
b
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Energy Levels: The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states for the transition that produces this light? (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 1.54 eV B. 1.65 eV C. 1.79 eV D. 1.81 eV
Which statement about the motion of the planets is INCORRECT?
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a. 90° c. 0° b. 180° d. 360°