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Which factor explains why coal dust is explosive? temperature surface area concentration addition of catalyst
answered Jul 12, 2017
3 votes
60.7k views
Which of the following best describes sperm production in the male human reproductive system? a. Four haploid cells, with 23 chromosomes each, undergo meiosis to form one diploid sperm cell, with 46 chromosomes.
answered Mar 1, 2017
4 votes
145k views
A soil expert told you that run off occurs more commonly over soil made mostly of clay than it does over soil made mostly of sand. What might this be
answered Mar 10, 2016
1 vote
208k views
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