Answer:
130.2dB
Explanation:
The formula for determining the intensity of a wave is expressed as
![I=\frac{P}{A}\\](https://tex.z-dn.net/?f=I%3D%5Cfrac%7BP%7D%7BA%7D%5C%5C)
Where P is the power in watts, and A is the area of the sphere formed by the wave
Data given
Power,P=3.65*10^5W
distance,d=52.7
Hence since the distance represent the radius, we can determine the area of the sphere formed
![A=4\pi r^{2}\\A=4\pi *52.7^{2}\\A=34900.45m^2](https://tex.z-dn.net/?f=A%3D4%5Cpi%20r%5E%7B2%7D%5C%5CA%3D4%5Cpi%20%2A52.7%5E%7B2%7D%5C%5CA%3D34900.45m%5E2)
The intensity can be computed as
![I=\frac{3.65*10^5}{34900.45}\\ I=10.46W/m^2](https://tex.z-dn.net/?f=I%3D%5Cfrac%7B3.65%2A10%5E5%7D%7B34900.45%7D%5C%5C%20I%3D10.46W%2Fm%5E2)
we can convert to decibel
![I=10log\frac{10.46}{10^{-12}} \\I=130.2dB](https://tex.z-dn.net/?f=I%3D10log%5Cfrac%7B10.46%7D%7B10%5E%7B-12%7D%7D%20%5C%5CI%3D130.2dB)
<h2>ANSWER:</h2><h2>
![\huge\boxed{0.5newton}](https://tex.z-dn.net/?f=%5Chuge%5Cboxed%7B0.5newton%7D)
_____________________________________</h2>
<u>DATA</u>:
m = 0.05 kg
Vf = 10 m/s
Vi = -10 m/s
t = 4 times hits in 2 second
<h2>_____________________________________</h2><h3><u>SOLUTION</u>:</h3>
The momentum ρ is given by,
ρ = mV
where,
m = mass
V = velocity
<h2>_____________________________________</h2>
The Equation for average force is given by,
F = Δρ/Δt
where,
Δt = time taken
Δρ = change in momentum. Which is given by,
Δρ=![MVf-Mvi](https://tex.z-dn.net/?f=MVf-Mvi)
Vf = final velocity which is the rebound velocity here
Vi = Initial velocity which is the velocity before striking the wall
So Substitute the equation of momentum in the equation of force
F = ![\frac{MVf - MVi}{t}](https://tex.z-dn.net/?f=%5Cfrac%7BMVf%20-%20MVi%7D%7Bt%7D)
<h2>_____________________________________</h2><h3>SUBSTITUTING THE VARIABLES IN THE EQUATION</h3>
F = ![\frac{MVf - MVi}{t}](https://tex.z-dn.net/?f=%5Cfrac%7BMVf%20-%20MVi%7D%7Bt%7D)
F = ![\frac{(0.05x10) - (0.05x-10)}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%280.05x10%29%20-%20%280.05x-10%29%7D%7B2%7D)
F = ![\frac{(0.5 + 0.5)}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%280.5%20%2B%200.5%29%7D%7B2%7D)
F = ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
F = 0.5N
<h3>__________________________________________________</h3><h2>0.5 NEWTON is the average force on the wall</h2><h2>_____________________________________ </h2>
Answer: 0.013 seconds
Explanation:
Given that
Mass of golf ball = 0.058 kg
Force = 272 N
Velocity = 62.0 m/s
Time taken = ?
Recall that force is the rate of change of momentum per unit time
i.e Force = Change in momentum / Time
i.e Force = (Mass x velocity) / Time
272N = (0.058 kg x 62.0 m/s) / Time
272N = 3.6kgm/s / Time
Time = (3.6kgm/s / 272N)
Time = 0.013 seconds
Thus, the ball was in contact with the club for 0.013 seconds
Answer:
Two objects that are the same volume will displace the same amount of water even if they have different masses.
Answer:
611.52 <---- Is your answer
Explanation:
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