1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nina [5.8K]
3 years ago
13

Sound is more effectively transmitted into a stethoscope by direct contact than through the air, and it is further intensified b

y being concentrated on the smaller area of the eardrum. It is reasonable to assume that sound is transmitted into a stethoscope 100 times as effectively compared with transmission though the air. What, then, is the gain in decibels produced by a stethoscope that has a sound gathering area of 15.0 cm2, and concentrates the sound onto two eardrums with a total area of 0.800 cm2 with an efficiency of 38.0%?
Medicine
1 answer:
zhenek [66]3 years ago
3 0

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

You might be interested in
Distinction D(i) Explain the scientific principles underlying the biological and physical procedures used to diagnose illness, s
weeeeeb [17]

Answer:

I'll wait ur answer after my online class

7 0
2 years ago
Imagine a world where health insurance does not exist. On the upside, you don’t have to pay any health insurance premiums! On th
Oksana_A [137]

Answer:

that's so true. and the world is still sort of like that, since some people don't have health insurance and they still have to pay with cash up front

3 0
2 years ago
An example of Sheet-forming collagens
Maslowich

Answer:

types 4,8,10

Explanation:

1.

Fibril-forming collagens (I, II, III, V, XI, XXIV, XXVII);

2.

Fibril-associated collagens with interrupted triple helices (FACITs) (IX, XII, XIV, XVI, XIX, XX, XXI, XXII). The FACITs do not form fibrils by themselves but they are associated with the surface of collagen fibrils.

3.

Network-forming collagens (IV, VIII, X) form a pattern in which four molecules assemble via their amino-terminal 7S domain to form tetramers while two molecules assemble via their carboxy-terminal NC1 domain to form NC1 dimers

4.

Membrane collagens (XIII, XVII, XXIII, XXV)

7 0
2 years ago
Read 2 more answers
Development of cognitive instruments for use in clinical trials of antidementia drugs: additions to the Alzheimer's Disease Asse
7nadin3 [17]

Development of cognitive instruments for use in clinical trials of antidementia drugs:Alzheimer's Disease Assessment Scale (ADAS).

What is Alzheimer's Disease Cooperative Study?

The Alzheimer's Disease Cooperative Study (ADCS) cognitive assessment procedure was created to investigate the validity and reliability of cognitive assessment tools that could be useful additions to the Alzheimer's Disease Assessment Scale (ADAS) or other short batteries used in antidementia medication studies. Patients with mild to moderate AD and elderly individuals with normal cognitive function underwent a battery of five tests at least three times over the course of a year as part of an overall ADCS protocol to create new instruments for use in clinical trials of treatments for Alzheimer's disease (AD). The main result of this inquiry was the discovery of certain prospective additions to the current ADAS that broaden the scope of the cognitive domains and symptom severity levels addressed.

Learn more about the Alzheimer's Disease Cooperative Study with the help of the given link:-

brainly.com/question/28196497

#SPJ4

4 0
1 year ago
This test confirms that your friend's dad has bacterial pneumonia. What medication might the doctor prescribe to treat this infe
svlad2 [7]
For adults, the most common treatment for bacterial pneumonia is macrolides antibiotics. For example azithromycin or erythromycin. For children however, amoxicillin would be used.
3 0
2 years ago
Other questions:
  • The recommended minimum daily protein requirement for the normal adult is ______.
    11·1 answer
  • The icd-10-cm codes assigned by the medical coder are used to evaluate healthcare utilization study healthcare costs research th
    13·1 answer
  • A nurse is instructing a client who has a new prescription for a daily dose of lovastatin extended release. Which of the followi
    14·1 answer
  • Which of the following would be expected to alter hormonal levels?
    15·1 answer
  • PLEASE HELP ME I DON’t UNDERSTAND!
    5·2 answers
  • Of the following three types of fat, which type is the most unhealthy?
    8·2 answers
  • Antibiotic steroids are used to build muscle mass quickly Why are they called antibiotic​
    7·1 answer
  • What does democratized knowledge mean?
    12·1 answer
  • REM sleep is: facilitated by alcohol and inhibited by sleeping pills. facilitated by alcohol and inhibited by sleeping pills. no
    5·2 answers
  • An ongoing clinical protocol at your site includes weekly blood draws to assess an exploratory endpoint. Unfortunately, particip
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!