Which of the following occur during an uncontrolled fission chain reaction?
A) A heavy nucleus is broken into smaller nuclei.
B) More neutrons are produced than are consumed.
C) both a and b
D) neither a nor b
C
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In 1992, the Canadian government ________
A) banned the use of trawl fishing B) started harvesting manganese nodules from the ocean floor C) ordered a complete ban on cod fishing D) enacted laws to protect many species of whales E) gave subsidies to fishermen who were losing money due to low fish harvests
The bite of a brown recluse spider:
A) may not result in immediate symptoms but generally presents as a painful, reddened area with an overlying blister. B) manifests with immediate and intense pain and the formation of a blister and a white surrounding area of ischemia. C) most often causes severe central nervous system depression because its venom contains a powerful neurotoxin. D) results in a local reaction only because the spider's venom is cytotoxic and spreads slowly throughout the bloodstream.
Each of the states in this region is named for its largest ethnic group except ________, whose largest ethnic group is the ________
A) Kazakhstan; Russians B) Afghanistan; Pashtuns C) Turkmenistan; Mongols D) Uzbekistan; Tajiks
Which of the following will have the highest electrical conductivity?
A) 0.1 M NaCl B) 0.2 M NaCl C) 0.3 M NaC2H3O2 D) 0.4 M NaC2H3O2