Answer:
For 60 Hz, the intensity should be 60 dB
For 100 Hz, the intensity should be 50 dB
For 800 Hz, the intensity should be approximately 38 dB
Explanation:
To understand what the sound intensity levels should be in order for each sound at different frequencies to be perceived as equally loud, we can make use of a helpful graph known as the Fletcher-Munson curve. For reference, the graph has been attached to this answer.
This graph has the intensity in dB on the y-axis and frequency on the x-axis. There are various curves plotted in the graph each corresponding to a specific intensity level at a defined standard frequency of 1000 Hz. So each plot on a curve denoted as 40 dB would sound as loud as that perceived from a sound with frequency of 1000 Hz and intensity of 40 dB.
To use the graph in order to answer the question, you simple look up the frequency, for example 60 Hz, on the x-axis and trace the line all the way up to the point it intersects with the curve labelled as "40 dB". From that point, go horizontally towards the y-axis to determine the intensity required for a sound at 60 Hz to sound as loud as the sound of 40 dB intensity at a frequency of 1000 Hz.
According to the information in the fragment, it can be inferred that it is an example of how scientific development has consequences on pre-established theories and new areas are created in science (option C)
<h3>What is a scientific theory?</h3>
A scientific theory is a term to refer to a set of concepts and observations that are proposed as principles to explain a class of phenomena.
According to the above, the discovery of germs and their relationship with human diseases was an event that changed scientific theories about human diseases because it demonstrated a different explanation than what was believed up to that time.
So, the correct answer is option C because this event changed scientific theory and opened new fields for scientific study and research.
Learn more about sciences in: brainly.com/question/12265124
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Answer:
The muscles, joints and bones are adversely affected by immobility. The bones lose calcium as a result of the lack of weight bearing activity and this can lead to disuse osteoporosis, hypercalcemia, and fractures.
Answer:
Explanation:
Given
Diver is at a depth of inside the water
As we go down pressure increases due to the weight of liquid column above us
Pressure difference is given by
Where =density of liquid
h=depth
g=acceleration due to gravity
So external-internal pressure difference is
Answer:
W 1920 N
Explanation:
200kg at a location where g=9.6m/s^2