What are the coordinates of point B' if the translation vector (7,-5) is applied to tríangle ABC to produce the image triangle A
'B'C'?
A.(-1,2)
B.(3,4)
C.(5,-2)
D.(-3,0)
A.(-1,2)
B.(3,4)
C.(5,-2)
D.(-3,0)
1 answer:
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Answer:
The wavelength, of a sound wave with a frequency of 20 waves per second is 15,000,000 m.
Step-by-step explanation:
In this question, we have to calculate the wavelength of a sound wave of frequency 20 waves per second.
We know that the speed of light in air/ vacuum is .
Now by the formula v = nλ , where v = speed of light in air/vacuum, n = frequency of the wave and λ = wavelength in meters,
we put the values
= 20 × λ
λ =
λ = 15,000,000 m