Have you ever heard an accessible pedestrian signal at a cross walk that sounds like
a chirp, intended to help people with visual impairments safely cross streets? Many
of these signals have been replaced because they were not optimally effective and
can be difficult to interpret. New recommendations include a rapid ticking or
beeping sound and/or a speech message saying the walk sign is on to help people
cross streets more safely. What aspects of complex sounds-spatial location or
timbre, loudness or pitch perception-could be used to improve these systems even
more and why?
Answers: 2
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Which animal group is the largest and contains more species from all the other living groups combined? is it mammals or
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Biology, 22.06.2019 00:00, unknown9263
Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h, o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.
Answers: 1
Biology, 22.06.2019 09:00, veikkoaval
Dan made the table shown to describe two different relationships between animals. organism interactions relationship a relationship b one organism lives inside the organism it feeds off no organism is harmed which of the following statements is most likely correct?
Answers: 1
Have you ever heard an accessible pedestrian signal at a cross walk that sounds like
a chirp, inte...
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