When you comb your hair and electrons are rubbed onto the comb, your hair becomes
A. positively charged.
B. ionized.
C. negatively charged.
D. none of the above
Answer: A
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An object weighs 30 N on Earth. A second object weighs 30 N on the Moon. Which has the greater mass?
A) the one on Earth B) the one on the Moon C) They have the same mass. D) not enough information given
The Kyoto Protocol was successful in reducing the greenhouse gas emissions of developed nations to 1990 levels.
Answer the following statement true (T) or false (F)
Which of the following places is well known for its intrusive igneous rocks that were exposed by erosion?
A) Yosemite National Park B) Yellowstone National Park C) Mount St. Helens Volcano D) Hawaii
A favorable condition for hurricane development is a
a. deep layer of stable air. b. shallow layer of absolutely unstable air. c. shallow layer of conditionally unstable air. d. deep layer of conditionally unstable air. e. completely stable environment.