A cloud-to-ground lightning discharge will sometimes appear to flicker. This is because
a. you are able to see charges.
b. you are barely able to distinguish separate return strokes.
c. the bright light causes you to blink.
d. of refraction caused by turbulent thunderstorm winds.
e. your eyes momentarily get blinded by lightning.
Question 2
An important principle in one of the theories of the electrification of clouds is that
a. there is a net transfer of negative ions from a warmer object to a colder object.
b. supercooled water is always negatively charged.
c. ice crystals are always negatively charged.
d. there is a net transfer of positive ions from a warmer object to a colder object.
e. raindrops are always positively charged.
California ground squirrel (Spermophilus beecheyi) in the man-made rocky shoreline of the Berkeley M
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