Explanation:
Human body, the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems.
https://www.britannica.com › science
human body | Organs, Systems, Structure, Diagram, & Facts |
Explanation:
Given that,
Distance 1, r = 100 m
Intensity, ![I_1=1.24\times 10^{-8}\ W/m^2](https://tex.z-dn.net/?f=I_1%3D1.24%5Ctimes%2010%5E%7B-8%7D%5C%20W%2Fm%5E2)
If distance 2, r' = 25 m
We need to find the intensity and the intensity level at 25 meters. Intensity and a distance r is given by :
.........(1)
Let I' is the intensity at r'. So,
............(2)
From equation (1) and (2) :
![I'=\dfrac{Ir}{r'^2}](https://tex.z-dn.net/?f=I%27%3D%5Cdfrac%7BIr%7D%7Br%27%5E2%7D)
![I'=\dfrac{1.24\times 10^{-8}\times 100}{25^2}](https://tex.z-dn.net/?f=I%27%3D%5Cdfrac%7B1.24%5Ctimes%2010%5E%7B-8%7D%5Ctimes%20100%7D%7B25%5E2%7D)
![I'=1.98\times 10^{-9}\ W/m^2](https://tex.z-dn.net/?f=I%27%3D1.98%5Ctimes%2010%5E%7B-9%7D%5C%20W%2Fm%5E2)
Intensity level is given by :
, ![I_o=10^{-12}\ W/m^2](https://tex.z-dn.net/?f=I_o%3D10%5E%7B-12%7D%5C%20W%2Fm%5E2)
![dB=10\ log(\dfrac{1.98\times 10^{-9}}{10^{-12}})](https://tex.z-dn.net/?f=dB%3D10%5C%20log%28%5Cdfrac%7B1.98%5Ctimes%2010%5E%7B-9%7D%7D%7B10%5E%7B-12%7D%7D%29)
dB = 32.96 dB
Hence, this is the required solution.
The continent of Antartica is located at the bottom of the world. the South Pole is at its center. Antarctica is the coldest and windiest place on earth. It is covered with ice up to 3 miles thick. Very few plants and animals can survive here, but penguins, fish, and seals live on the coast and in the seas. No people live on Antarctica permanently, but scientists and tourists visit.
<span>Cytoplasm: <span>the entire contents of the cell, exclusive of the nucleus and bounded by the plasma membrane.
Hope this helped. :)</span></span>
Net force on the car=F=4.8 x 10³ N
Explanation:
mass of car= 1.2 x 10³ Kg
initial velocity= Vi=0
Final velocity= Vf= 20 m/s
time = t= 5 s
Using kinematic equation,
Vf= Vi + at
20= 0 + a (5)
5 a=20
a= 20/5
a= 4 m/s²
Now force is given by F = ma
F= 1.2 x 10³ (4)
F=4.8 x 10³ N