Dad stands at rest on a kitchen floor. When son Hudson is given a piggyback, the support force beneath Dad
A. increases.
B. decreases.
C. remains constant.
D. none of the above
Answer: A
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Which of the following statements best describes the role of neutrons in the nucleus?
A. The neutrons stabilize the nucleus by balancing charge. B. The neutrons stabilize the nucleus by attracting other nucleons. C. The neutrons stabilize the nucleus by forming bonds with other neutrons. D. The neutrons stabilize the nucleus by adding mass. E. The neutrons stabilize the nucleus by attracting protons.
Only eukaryotic cells can reproduce sexually. Indicate whether the statement is true or false
What percentage of electrical power in the U.S. is generated from nuclear sources?
a. ?less than one percent b. ?five percent c. ?10 percent d. ?15 percent e. ?20 percent
A swallow hole is most closely associated with ________
A) geysers B) fumaroles C) tower karst D) a magma chamber E) sinkholes