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
Answer:
E
Explanation:
stapedius is innervated by the facial nerve and it is a muscle in the ear which causes sensitivity to or distortion of noises
False, the body has its adaptive defenses.
Innate defense is the first line of protection against all diseases and infections, but adaptive immunity also has the power to fight off pathogens and infections brought on by external objects.
Therefore, it is not accurate to say that our body would be totally unprotected since adaptive immunity will also manifest itself to get rid of the disease-causing substance. This is a false assertion, then.
The correct answer is that adaptive immunity will combat pathogens or foreign body infections if innate immunity fails to protect against a disease or infection because adaptive immunity also works to eradicate the disease-causing agent.
Here's another question with an answer similar to this about adaptive defenses: brainly.com/question/13799731
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Answer:
a. Acetyl CoA
Explanation:
Acetyl-CoA is produced in the mitochondria by the process of oxidative decarboxylation of pyruvate and β-oxidation of the fatty acids.
However, <u>both acetyl CoA and Oxaloacetate cannot cross mitochondrial membrane.</u> But the two join together to form citrate and thus, citrate can cross the mitochondrial membrane.
