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What is the approximate distance between Portland, Oregon (45° north, 122° west), and San Francisco, California (37° north, 122° west). Use 3,960 miles for the radius of Earth.
answered
Nov 25, 2017
Mathematics
high-school
4
votes
78.6k
views
Example of heterogeneous and homogeneous matter
answered
Apr 9, 2017
Chemistry
college
1
vote
70.2k
views
What events first sparked Europeans' interest in Asia and the Middle East, starting in the thirteenth century?
answered
Mar 6, 2017
History
high-school
4
votes
227k
views
What is the speed of each neutron as they crash together? keep in mind that both neutrons are moving?
answered
Feb 9, 2017
Physics
high-school
4
votes
44.0k
views
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