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KIM [24]
3 years ago
8

The sound intensity at the ear of passenger in a car with a damaged muffler is 8.0 × 10-3 W/m2. What is the intensity level of t

his sound in decibels? Use the threshold of hearing (1.0 × 10-12 W/m2) as the refere
Physics
1 answer:
Mama L [17]3 years ago
4 0

Answer:

99 dB

Explanation:

We have given that sound intensity with a damaged muffler =8× 10^{-3}

we have to find the intensity level of the this sound in decibels

for calculating in decibels we have to use the formula

β=10log\frac{I}{I_0}

  =10log\frac{.008}{10^{-12}}

   =10 log8+10 log10^{9}

   =10 log8+90 log10

   =10×0.9030+90

   =99 dB

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ivann1987 [24]

Answer:

The average speed is 10,082

Explanation:

Do the formula

Distance * time = speed

2840 * 3.55

= 10,082

4 0
3 years ago
During the photoelectric effect experiment, a photon is emitted with 5.73 x10-20 J of kinetic energy. If the work function of th
Lapatulllka [165]

Answer:

Frequency of incident light = 995×10 12

Explanation:

hope this helped you :)

4 0
2 years ago
Viruses use the energy of the ______ cells to reproduce themselves​
galben [10]
<h2>Hey there!</h2>

<h2>The answer will be:</h2>

<h3>"Host"</h3>

<h2>Explanation:</h2><h2 /><h3>Viruses use the energy of the <u>host</u> cells to reproduce themselves​.</h3>

<h2>Hope it help you</h2>

5 0
2 years ago
• How much work is<br>required to lift a 2kg<br>object 2m high?<br>​
pychu [463]

Answer You need to consider that the gravity on earth is 9.8 m/s/s. This means any object you let go on the earths surface will gain 9.8 m/s of speed every second. You need to apply a force on the object in the opposite direction to avoid this acceleration. If you are pushing something up at a constant speed, you are just resisting earths acceleration. The more massive and object is, the greater force is needed to accelerate it. The equation is Force = mass*acceleration. So for a 2kg object in a 9.8 m/s/s gravity you need 2kg*9.8m/s/s = 19.6 Newtons to counteract gravity. Work or energy = force * distance. So to push with 19.6 N over a distance of 2 meters = 19.6 N*2 m = 39.2 Joules of energy. There is an equation that puts together those two equations I just used and it is E = mgh

The amount of Energy to lift an object is (mass) * (acceleration due to gravity) * (height)

:Hence, the Work done to life the mass of 2 kg to a height of 10 m is 196 J. Hope it helps❤️❤️❤️

Explanation:

7 0
3 years ago
Raghu studies in grade 6th. He wants a cricket bat to be made by a carpenter. He tells the
kvasek [131]

Based on the information given, it can be noted that the bat was either shorter or longer than what he expected.

From the information given, it was stated that Raghu wants a cricket bat to be made by a carpenter and he tells the carpenter that the length of the bat should be 7 hand spans.

Since he got disappointed when he collected the bat, the reason for this will be because the bat was either shorter or longer than what he requested.

Learn more about length on:

brainly.com/question/25292087

8 0
2 years ago
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