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Zepler [3.9K]
3 years ago
10

What decibel level can cause hearing damage to begin

Physics
2 answers:
Julli [10]3 years ago
7 0

Answer:

The decibel level that starts to have hearing damage is 120 dB.

Explanation:

densk [106]3 years ago
4 0

Answer: Noise above 70 dB can cause hearing damage

Explanation:

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Protein synthesis is vital for cell growth and metabolism. Transcription and translation are known as the central dogma of biolo
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An initially stationary object experiences an acceleration of 6 m/s2 for a time of 15 s. How far will it travel during that time
umka21 [38]

Answer:

Explanation:

s = s₀ + v₀t + ½at²

s = 0 + 0(15) + ½(6)(15²)

s = 675 m

Not sure what the free fall acceleration is needed for, but if the object is dropped from a high enough point, it will travel in 15 seconds

s = ½10(15²) = 2250 m  if air resistance is ignored

7 0
2 years ago
An auditorium measures 40.0 m 3 20.0 m 3 12.0 m. The density of air is 1.20 kg/m3. What are (a) the volume of the room in cubic
Burka [1]

We use the formula,

m = V\rho

Here, m is the mass, V is the volume and  \rho density

Also

V = l w h

Here l is length, w is width and h is height.

(a) The volume of the room,

V=40.0 \ m \times 3 20.0 \ m \times 3 12.0\ m = 3.99 \times 10^{6} m^3

The volume of the room in cubic feet,

V = 3.99 \times 10^{6} m^3 \times(\frac{3.281 \ ft}{m} )^3 = 4.3 \times 10^7 \ ft^3

(b) Now the mass of the air in room,

m= (3.99 \times 10^{6} \ m^3) (1.20 \ kg/m^3) = 4.8 \times 10^6 kg.

Therefore, the weight of the air in room,

W = mg= 4.8 \times 10^6 kg \times 9.8 m/s^2 = 46.9 \times 10^6 \ N \\\\ W = 4.69 \times 10^7 \ N.

The weight of air in the room in pounds,

W = 4.69 \times 10^7 \ N ( \frac{1 \ lb}{4.448 \ N} ) = 1.1 \times 10^7 \ lb


3 0
3 years ago
Can anyone help?6th question.free brainliest answer...
DIA [1.3K]

There's a crest and a trough in each complete wave.  So the question is describing 10 complete waves.

After that, the question becomes somewhat murky.  It goes on to say "its time period is 0.2 seconds".  

-- The "time period" of a wave is usually defined as the time for <u><em>one</em></u> complete wave.  If that's what the phrase means, then ...

Frequency = ( 1/0.2sec )

<em>Frequency = 5 Hz.</em>

<em>= = = = = = = = = =</em>

<u>BUT</u> ... Is the question awkwardly trying to tell us that the <u><em>10 waves</em></u> take 0.2 seconds ?  If that's what it's saying, then ...

Frequency = (10) / (0.2 sec)

<em>Frequency = 50 Hz .</em>

6 0
3 years ago
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