Answer: Δβ = 28.5278 dB
Explanation:
from the question we are given that;
the sound gathering area Ga = 15.0 cm²
total area Ae = 0.800 cm²
efficiency ε = 38 %
therefore we have that the effective gathering area of the stethoscope is;
As = ε Ga
As = 38 % × 15 = 5.7 cm²
But I ∝ 1/A
where Ie/Is = As/Ae
Ie/Is = 5.7/0.800 = 7.125
given that we are to assume that sound is transmitted into a stethoscope 100 times, this gives
I'e/I's = Ie/Is × 100 = 7.125 × 100 = 712.5
Δβ = βe - βs = (10dB) log (I'e/Io) - (10dB) log (I's/Io)
Δβ = (10dB) log (I'e/I's)
Δβ = (10dB) log (712.5) = 28.5278
Δβ = 28.5278 dB
cheers i hope this helps
Maintaining hip flexion at 90 degrees or less when sitting is the appropriate instructions in which the nurse should include in the teaching to the individual who just went through total hip arthroplasty.
<h3>
What is Arthroplasty?</h3>
This is a medical procedure which involves remodeling of the joint so as to restore its functions. The damaged joint is usually replaced with an artificial one in this scenario thereby ensuring certain types of movements are restored.
The individual should always maintain a hip flexion at 90 degrees or less when sitting so as to prevent the joint from being stressed which helps maintain its functions. This should also be done to avoid the incidence of the dislocation of the joint.
This is therefore the reason why maintaining a hip flexion at 90 degrees or less is the most appropriate choice.
Read more about Arthroplasty here brainly.com/question/16395650
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Group O is a universal donor, this, if group O blood is mixed with group A or group B blood,no agglutination occurs.
<h3>What is blood grouping?</h3>
Blood grouping refers to the process of grouping individuals blood based on the antigen protein found on the surface of to the red blood cells.
There are four blood groups:
- Group A with antigen A
- Group B with antigen B
- Group AB with both A and B antigen
- Group O with neither A or B antigen
Group O is a universal donor
If group O blood is mixed with group A or group B blood,no agglutination occurs.
Learn more about blood groups at: brainly.com/question/3044607