Answer
given,
Distance for decibel reading
r₁ = 13 m
r₂ = 24 m
When the engineer is at r₁ reading is β₁ = 101 dB
now, Calculating the Intensity at r₁
Using formula
![\beta = 10 log(\dfrac{I}{I_0})](https://tex.z-dn.net/?f=%5Cbeta%20%3D%2010%20log%28%5Cdfrac%7BI%7D%7BI_0%7D%29)
I₀ = 10⁻¹² W/m²
now inserting the given values
![101= 10 log(\dfrac{I}{10^{-12}})](https://tex.z-dn.net/?f=101%3D%2010%20log%28%5Cdfrac%7BI%7D%7B10%5E%7B-12%7D%7D%29)
![10.1= log(\dfrac{I}{10^{-12}})](https://tex.z-dn.net/?f=10.1%3D%20log%28%5Cdfrac%7BI%7D%7B10%5E%7B-12%7D%7D%29)
![\dfrac{I}{10^{-12}}= 10^{10.1}](https://tex.z-dn.net/?f=%5Cdfrac%7BI%7D%7B10%5E%7B-12%7D%7D%3D%2010%5E%7B10.1%7D)
![I =10^{10.1} \times 10^{-12}](https://tex.z-dn.net/?f=I%20%3D10%5E%7B10.1%7D%20%5Ctimes%2010%5E%7B-12%7D)
I = 0.01258 W/m²
now, calculating power at r₁
P₁ = I₁ A₁
P₁ = 0.01258 x 4 π r²
P₁ = 0.01258 x 4 π x 13²
P₁ = 26.72 W
Answer:
V = P = 0 m/s
Explanation:
When a pendulum bob is given an initial displacement or the initial velocity, it starts to execute periodic motion or simple harmonic motion. During this motion the kinetic and potential energy keeps interconverting. The kinetic energy becomes maximum at the lowest point, that is the mean point. Hence, the velocity is maximum at this point, as well. Similarly, at both extreme positions the potential energy becomes maximum due to maximum height, while the kinetic energy becomes zero at the highest point, that is extreme positions. At these, positions the velocity will be minimum and it will be zero due to zero kinetic energy. Hence, at both extreme positions the bob stops momentarily before, reversing the direction. Hence,
<u>V = P = 0 m/s</u>
The official web site of the Nobel Prize explains that Marie Curie’s chemistry prize was partly for her discovery that the radioactivity of a substance is unaffected when it undergoes a chemical reaction. The discovery implied was that, Radioactivity involves Radioactivity involves only neutrons.
Explanation:
- The official web site of the Nobel Prize explains that Marie Curie’s chemistry prize was partly for her discovery that the radioactivity of a substance is unaffected when it undergoes a chemical reaction. The discovery implied was that, Radioactivity involves only neutrons.
- Marie Curie studied about the radiation of all compounds containing the known radioactive elements, including uranium and thorium, which she later discovered that they were radioactive.
- she discovered the following results,
- the exact measurement of the strength of the radiation from uranium;
- the intensity of the radiation was found to be proportional to the amount of uranium or thorium in the compound .
- the ability to emit radiation is not dependent on the arrangement of the atoms in a molecule;
- it must be linked to the interior of the atom itself which is a revolutionary discovery.
We are given with a figure in which the container is inserted with a tube. The pressure inside the tube is greater than the pressure outside the tube because primarily of the smaller area of the tube. This increases up the pressure and let the fluid rise up
Answer:
Explanation:
I am sorry but please give detailed question