The diagram is missing; however, we know that the intensity of a sound wave is inversely proportional to the square of the distance from the source:
![I(r)= \frac{1}{r^2}](https://tex.z-dn.net/?f=I%28r%29%3D%20%5Cfrac%7B1%7D%7Br%5E2%7D%20)
where I is the intensity and r is the distance from the source.
We can assume for instance that the initial distance from the source is r=1 m, so that we put
![I= \frac{1}{r^2}= \frac{1}{(1)^2}=1](https://tex.z-dn.net/?f=I%3D%20%5Cfrac%7B1%7D%7Br%5E2%7D%3D%20%5Cfrac%7B1%7D%7B%281%29%5E2%7D%3D1%20%20)
The intensity at r=3 m will be
![I= \frac{1}{r^2}= \frac{1}{(3)^2}= \frac{1}{9}](https://tex.z-dn.net/?f=I%3D%20%5Cfrac%7B1%7D%7Br%5E2%7D%3D%20%5Cfrac%7B1%7D%7B%283%29%5E2%7D%3D%20%5Cfrac%7B1%7D%7B9%7D%20%20%20)
Therefore, the sound intensity has decreased by a factor
![1/9](https://tex.z-dn.net/?f=1%2F9)
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Answer:
10V = 1mA(1Ω + Rs)
Rs=10-1
Rs=9Ω
Explanation:
See the attached picture for diagram.
Answer:
d license with maintenance .
Explanation:
just took this test. :)
Answer:
Free body diagram
Explanation:
A free body diagram shows all the forces acting on an object. an example would be a box sitting on the floor.
Draw a square and you would have an arrow from the box pointed down to represent gravity pulling the box down and an arrow from the box pointing upwards to represent the normal force of the ground pushing back. in the scenario the two arrows would be equal length because the forces balance out since the box is motionless. in a situation where there is motion one arrow would be bigger such as if a box was falling. in this example it would have an arrow down to show gravity but no arrow up because it is in free fall. The sum of the forces which is represented by the arrows is what your net force is. The free body diagram helps you visualize all the forces acting on an object.
Answer:
Soccer is a great way to maintain health, fitness, strength, and endurance. Soccer can help with cardiovascular health, lower body fat and improves muscle tone, increases muscle and bone strength, and improves health due to shifting between walking, running, and sprinting. Soccer can also promote teamwork and sharing, increase skills in concentration, persistence, and self-discipline, and can provide an opportunity to build your confidence and self-esteem, and it can also reduce anxiety.
Explanation: