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What might cause a prolonged period of heavy thunderstorm rains over relatively flat terrain
answered
Feb 15, 2018
Chemistry
high-school
5
votes
75.3k
views
Why doesn't an animal cell have a cell wall?
answered
Dec 13, 2017
Biology
middle-school
6
votes
96.5k
views
A dead or weakened pathogen used to establish immunity would most likely be found in?
answered
Oct 3, 2017
Biology
high-school
2
votes
7.8k
views
Which air pollutant affects people who have heart disease? Carbon monoxide Pollution Particulate matter Ozone
answered
Feb 19, 2017
Chemistry
high-school
4
votes
178k
views
What is E=m² the famous theory of albert einstien?
answered
Aug 3, 2015
Physics
middle-school
2
votes
231k
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