Ineed some w/ this:
a police car siren emits a frequency of 2010 hz when stationary. when it is driving toward a stationary car, the other driver hears a frequency of 2120 hz. how fast is the police car driving?
using the doppler's effect equation, i got the answer ±16.3, but that apparently isn't the correct answer.
edited: ohhh ok, i got it, answer is 17.7 whoops
Answers: 3
Physics, 21.06.2019 19:30, yolinda123429
Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.
Answers: 1
Physics, 22.06.2019 15:30, Mhayslett12
To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin. answer in one word. part bfind e(r), the magnitude of the electric field at distance r from the point charge q. express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q. express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r
Answers: 2
Ineed some w/ this:
a police car siren emits a frequency of 2010 hz when stationary. w...
a police car siren emits a frequency of 2010 hz when stationary. w...
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