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VARVARA [1.3K]
3 years ago
5

What is the oscillation period of your eardrum when you are listening to the A4 note on a piano (frequency 440 Hz)?

Physics
2 answers:
Ulleksa [173]3 years ago
5 0

Answer:

<em>T </em>= 0.002 <em>s</em>.

Explanation:

Given data:

Frequency, f = 440 \ \rm Hz

The time period of oscillation of the eardrum can be expressed as,

T = \frac{1}{f}

T = \frac{1}{440 \ \rm Hz}

T = 0.002 \ s.

Contact [7]3 years ago
4 0

The period is the inverse of the frequence:

T=\dfrac{1}{f}=\dfrac{1}{440}=0.0022\overline{72}

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Answer:

f something happens to go wrong at a nuclear reactor, anyone living in a 10-mile radius of the plant may have to evacuate. This map also shows a 50-mile evacuation zone, the safe distance that the U.S. government recommended to Americans who were near

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2 years ago
Given that:<br><br> = 2i + 9j ; and ⃗ = -i – 4j . Find . ⃗ ​
Marat540 [252]

Answer:

A.B = -38

Explanation:

A = 2i + 9j and B = -i - 4j.

So, A.B = (2i + 9j).(-i - 4j)

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since i.i = 1, j.j = 1, i.j = 0 and j.i = 0, we have

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5 0
3 years ago
The formula shown below is used to calculate the energy released when a specific quantity of fuel is burned. Calculate the energ
mafiozo [28]

Answer: 8400 J

Explanation:

The formula referenced in the question is:

Q=m. c. \Delta T  

Where:

Q  is the thermal energy

m=100g \frac{1 kg}{1000 g}=0.1 kg is the mass  of the water sample

c=4200 \frac{J}{kg\°C}  is the specific heat capacity of  water

\Delta T=20\°C  is the variation in temperature

Solving:

Q=(0.1 kg)(4200 \frac{J}{kg\°C})(20\°C)  

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2 years ago
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S_A_V [24]
First what is an equivalent angle for 310 degrees rotated counter clockwise? -50 degrees. so we're in the fourth quadrant. meaning X must be positive and Y must be negative.

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cosine relates to X so use 37cos(-50) equals about 23.8
7 0
3 years ago
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