Answer:
Explanation:
In the decibel scale , intensity of sound changes logarithmically as follows
Value in decibel scale , the value of I₀ = 10⁻¹² W /m².
Putting the values
![10log\frac{I}{10^{-12}} = 71](https://tex.z-dn.net/?f=10log%5Cfrac%7BI%7D%7B10%5E%7B-12%7D%7D%20%3D%2071)
![log\frac{I}{10^{-12}} = 7.1](https://tex.z-dn.net/?f=log%5Cfrac%7BI%7D%7B10%5E%7B-12%7D%7D%20%3D%207.1)
![\frac{I}{10^{-12}} = 10^{7.1}](https://tex.z-dn.net/?f=%5Cfrac%7BI%7D%7B10%5E%7B-12%7D%7D%20%3D%2010%5E%7B7.1%7D)
W/m²
Similarly for 54 dB sound intensity can be given as follows
I = 10⁻¹² x ![10^{5.4}](https://tex.z-dn.net/?f=10%5E%7B5.4%7D)
W / m²
For intensity of sound the relation is as follows
I = 2π²υ²A²ρc where υ is frequency , A is amplitude , ρ is density of air and c is velocity of sound .
Putting the given values for 71 dB
= 2π² x 504²xA²x 1.21 x 346
A² = 60.03 x 10⁻¹⁶
A = 7.74 x 10⁻⁸ m
For 54 dB sound
= 2π² x 504²xA²x 1.21 x 346
A² = 1.1978 x 10⁻¹⁶
A = 1.1 x 10⁻⁸ m
Answer:
C
Explanation:
When A and B come in contact with each other, +12 - 12 = 0 so their changes cancel.
Now C has a charge of +12
When A and C come together they each have an equal share of that 12, so each of them has 6
So the answer is
A B C
6 0 6
which is C
The Answer Is:
High Quality of Life Come With Restriction On Civil Liberties
First, we calculate for the weight of the object by multiplying the given mass by the acceleration due to gravity which is equal to 9.8 m/s²
Weight = (14 kg)(9.8 m/s²)
Weight = 137.2 N
The component of the weight that is along the surface of the inclined plane is equal to this weight times the sine of the given angle.
Weight = (137.2 N)(sin 52°)
weight = 108.1 N