A company records authors reading their books aloud. These recordings are shared with libraries around the world for people to l
isten to. The company recently changed to using digital recordings. Which two reasons may explain why the company no longer uses an analog signal for its recordings?
A. The analog signal uses only two values.
B. The analog signal cannot be sent long distances.
C. The analog signal is more likely to be affected by noise.
D. The analog signal will lose quality when it is copied many times.
A. The analog signal uses only two values.
B. The analog signal cannot be sent long distances.
C. The analog signal is more likely to be affected by noise.
D. The analog signal will lose quality when it is copied many times.
2 answers:
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Answer:
Attractive
Explanation:
Data provided in the question
The potential energy of a pair of hydrogen atoms given by
Based on the given information, the force that one atom exerts on the other is
Potential energy μ =
Force exerted by one atom upon another
or
or
As we can see that the comes in positive and constant which represents that the force is negative that means the force is attractive in nature
Answer:
a) f ’’ = f₀ , b) Δf = 2 f₀
Explanation:
a) This is a Doppler effect exercise, which we must solve in two parts in the first the emitter is fixed and in the second when the sound is reflected the emitter is mobile.
Let's look for the frequency (f ’) that the mobile aorta receives, the blood is leaving the aorta or is moving towards the source
f ’= fo
This sound wave is reflected by the blood that becomes the emitter, mobile and the receiver is fixed.
f ’’ = f’
where c represents the sound velocity in stationary blood
therefore the received frequency is
f ’’ = f₀
let's simplify the expression
f ’’ = f₀ \frac{c+v}{c-v}
f ’’ = f₀
b) At the low speed limit v <c, we can expand the quantity
(1 -x)ⁿ = 1 - x + n (n-1) x² + ...
f ’’ = fo
f ’’ = fo
leave the linear term
f ’’ = f₀ + f₀ 2
the sound difference
f ’’ -f₀ = 2f₀ v/c
Δf = 2 f₀