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Some fuel cells are powered by hydrogen. Scientists are looking into the decomposition of water (H2O) to make hydrogen fuel with the help of the Sun’s energy. What challenge do scientists face with this
answered
Feb 13, 2019
Chemistry
middle-school
2
votes
4.9k
views
David rosenhan (1973) sent eight normal people to various psychiatric hospitals. all eight complained of hearing voices that said "empty," "hollow," and "thud." after being admitted to one of the hospitals,
answered
Jan 30, 2019
Social Studies
high-school
1
vote
40.0k
views
4/5x = 7/5 I don't understand this.
answered
Nov 28, 2018
Mathematics
middle-school
5
votes
202k
views
Which is the most important element in writing a formal complaint letter? A. an engaging tone B. elaborate details and imagery C. correct grammar, punctuation, and spelling D. a clear statement of purpose
answered
Sep 22, 2018
English
high-school
6
votes
166k
views
If you are using a thermometer, you are measuring the
answered
Oct 24, 2017
Chemistry
high-school
4
votes
133k
views
Determine whether the formula describes y as a function of x. Explain your reasoning. (2 points) y = 9x + 1
answered
Sep 24, 2016
Mathematics
high-school
5
votes
87.9k
views
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