Answer:
Apparent frequency increases for Bob and decreases for Jill.
Explanation:
Doppler effect refers to the apparent change in frequency when there is relative motion between source and the listener. When the source and listener move closer, the apparent frequency heard by the listener increases. And when the source and listener move away from each other, the apparent frequency heard by the listener decreases.
Thus, when the emergency vehicle approaches Bob, the apparent frequency of the siren increases. It moves away from Jill, the apparent frequency heard by the Jill decreases.
Answer:
ρm=4.14g/ml :metal density
Explanation:
Conceptual analysis
We apply the formula to calculate the density:
ρ= m /V Formula (1)
Where:
ρ:density in g/mL
m: mass in g (grams)
V= volume in ml (milliliters)
Known data
: final volume of liquid=55.25 ml
: final volume of liquid=61.00 ml
ms: metal mass=23.795 g
Problem development
The volume of the metal (vm) is equal to the change in volume of the liquid.
![V_{m} = V_{fl}-V_{il} =61.00 ml - 55.25 ml =5.75ml](https://tex.z-dn.net/?f=V_%7Bm%7D%20%3D%20V_%7Bfl%7D-V_%7Bil%7D%20%20%3D61.00%20ml%20-%2055.25%20ml%20%3D5.75ml)
We replace the data in formula (1 )to calculate the density of the metal(ρm):
ρm= mm /Vm=23.795 g/5.75ml
ρm=4.14g/ml
Answer:
The source is at a distance of 4.56 m from the first point.
Solution:
As per the question:
Separation distance between the points, d = 11.0 m
Sound level at the first point, L = 66.40 dB
Sound level at the second point, L'= 55.74 dB
Now,
![L' = 10log_{10}\frac{I'}{I_{o}}](https://tex.z-dn.net/?f=L%27%20%3D%2010log_%7B10%7D%5Cfrac%7BI%27%7D%7BI_%7Bo%7D%7D)
where
![I_{o} = 10^{- 12} W/m^{2}](https://tex.z-dn.net/?f=I_%7Bo%7D%20%3D%2010%5E%7B-%2012%7D%20W%2Fm%5E%7B2%7D)
I = Intensity of sound
Now,
![I = \frac{P}{4\pi R^{2}}](https://tex.z-dn.net/?f=I%20%3D%20%5Cfrac%7BP%7D%7B4%5Cpi%20R%5E%7B2%7D%7D)
Similarly,
![I' = \frac{P}{4\pi (R + 11.0)^{2}}](https://tex.z-dn.net/?f=I%27%20%3D%20%5Cfrac%7BP%7D%7B4%5Cpi%20%28R%20%2B%2011.0%29%5E%7B2%7D%7D)
Now,
![\frac{I}{I'} = \frac{(R + 11.0)^{2}}{R^{2}}](https://tex.z-dn.net/?f=%5Cfrac%7BI%7D%7BI%27%7D%20%3D%20%5Cfrac%7B%28R%20%2B%2011.0%29%5E%7B2%7D%7D%7BR%5E%7B2%7D%7D)
![\frac{10^{- 5.36}}{10^{- 6.426}} = \frac{(R + 11.0)^{2}}{R^{2}}](https://tex.z-dn.net/?f=%5Cfrac%7B10%5E%7B-%205.36%7D%7D%7B10%5E%7B-%206.426%7D%7D%20%3D%20%5Cfrac%7B%28R%20%2B%2011.0%29%5E%7B2%7D%7D%7BR%5E%7B2%7D%7D)
![R ^{2} + 22R + 121 = 11.64R^{2}}](https://tex.z-dn.net/?f=R%20%5E%7B2%7D%20%2B%2022R%20%2B%20121%20%3D%2011.64R%5E%7B2%7D%7D)
![10.64R ^{2} - 22R - 121 = 0](https://tex.z-dn.net/?f=10.64R%20%5E%7B2%7D%20-%2022R%20-%20121%20%3D%200)
Solving the above quadratic eqn, we get:
R = 4.56 m
The difference between the majority viewpoint and the minority view is that the majority group is made to feel <u>normal</u> and the minority group is made to feel <u>divergent</u>.
<h3>What is the viewpoint?</h3>
A vantage point or point of view from which something is viewed or assessed is known as the viewpoint The story is narrated from a variety of perspectives, including two major ones and several smaller ones.
Most studies comparing majority versus minority influence argue the author, places a premium on influence in the sense of prevailing. In this context.
There is evidence that majorities have greater public influence than minorities, and that minority impact when it happens, is mostly latent. In the current version,
Hence the difference between the majority viewpoint and the minority view is that the majority group is made to feel <u>normal</u> and the minority group is made to feel <u>divergent</u>.
To learn more about the viewpoint refer to the link;
brainly.com/question/1043206