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The Doppler effect is an effect produced by a moving source of sound or electromagnetic waves due to the relative motion of a source or a receiver. If an emergency vehicle approaches Bob and moves away
answered
Aug 26, 2018
Physics
high-school
4
votes
174k
views
Is a diatom a protist?
answered
Jun 27, 2018
Chemistry
middle-school
5
votes
143k
views
Sanitation standards are part of a state’s responsibility to protect
answered
Feb 8, 2018
History
college
5
votes
224k
views
The movement of surface water into rock or soil through cracks and pore spaces is called
answered
Feb 14, 2017
Biology
high-school
4
votes
168k
views
If the vertices of / are B(–3, 3), C(3, 5), and D(–1, 0), what is the perimeter
answered
Apr 30, 2016
Mathematics
high-school
4
votes
3.6k
views
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