Answer:
No, it is not necessary for them to have same mass.
Explanation:
Let both bodies have a density d1 and d2 respectively.
Since their volumes are equal V1 = V2
we know that, https://tex.z-dn.net/?f=%5Cfrac%7Bmass%7D%7Bvolume%7D
Hence, d1 = and d2 =
Taking the ratio of densities,we get
This implies that unless the bodies have same densities, the mass of the two bodies will not be same.
C. Insulator
It COULD be semi-insulator but i'm sure its C
Answer:
![\mathbf{\beta = 123.75 \ dB}](https://tex.z-dn.net/?f=%5Cmathbf%7B%5Cbeta%20%3D%20123.75%20%5C%20dB%7D)
Explanation:
From the question, using the expression:
![125 \ dB = 10 \ log (\dfrac{I}{I_o})](https://tex.z-dn.net/?f=125%20%5C%20dB%20%3D%2010%20%5C%20log%20%28%5Cdfrac%7BI%7D%7BI_o%7D%29)
where;
![I_o = 10^{-12} \ W/m^2](https://tex.z-dn.net/?f=I_o%20%3D%2010%5E%7B-12%7D%20%5C%20W%2Fm%5E2)
![I = 10^{12.5} \times 10^{-12} \ W/m^2](https://tex.z-dn.net/?f=I%20%3D%2010%5E%7B12.5%7D%20%5Ctimes%2010%5E%7B-12%7D%20%5C%20W%2Fm%5E2)
![I = 3.162 \ W/m^2](https://tex.z-dn.net/?f=I%20%3D%203.162%20%5C%20W%2Fm%5E2)
This is a combined intensity of 4 speakers.
Thus, the intensity of 3 speakers = ![\dfrac{3.162\times 3}{4}](https://tex.z-dn.net/?f=%5Cdfrac%7B3.162%5Ctimes%203%7D%7B4%7D)
= 2.372 W/m²
Thus;
![\beta = 10 \ log ( \dfrac{2.372}{10^{-12}} ) \ W/m^2](https://tex.z-dn.net/?f=%5Cbeta%20%3D%2010%20%5C%20%20log%20%28%20%5Cdfrac%7B2.372%7D%7B10%5E%7B-12%7D%7D%20%29%20%5C%20W%2Fm%5E2)
![\mathbf{\beta = 123.75 \ dB}](https://tex.z-dn.net/?f=%5Cmathbf%7B%5Cbeta%20%3D%20123.75%20%5C%20dB%7D)
<span>An atom’s emission of light with a specific amount of energy confirms that </span><span>electrons emit and absorb energy based on their position around the nucleus.
The light emitted from an electron is a result of the electron's quantum jumps/leaps ( atomic electron transitions ) to and from different energy levels.</span>