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max2010maxim [7]
3 years ago
14

Which game represents a wave​

Physics
1 answer:
alisha [4.7K]3 years ago
6 0
Dominoes does because when you hit one, it knocks over the next one, and so on, so forth. The same type of pattern happens in a wave.
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A 60 year old person has a threshold of hearing of 95.0 dB for a sound with frequency f=10,000 Hz. By what factor must the inten
Nadusha1986 [10]

Answer:

The intensity increased by a factor of 158489

Explanation:

Given that,

Sound level = 95.0 dB

Sound level = 43.0 dB

Frequency = 10000 Hz

We need to calculate the ratio of sound intensity

Using formula of sound level

sound\ level =10 log\dfrac{I}{I_{0}}

Put the value into the formula

95.0=10\ log\dfrac{I_{1}}{I_{0}}...(I)

43.0=10\ log\dfrac{I_{2}}{I_{0}}.....(II)

Subtracting these equations

52.0=10\ log\dfrac{I_{1}}{I_{2}}

\log\dfrac{I_{1}}{I_{2}}=5.2

Taking inverse log

\dfrac{I_{1}}{I_{2}}=10^{5.2}

\dfrac{I_{1}}{I_{2}}=158489

Hence, The intensity increased by a factor of 158489

4 0
2 years ago
Gymnastics has great benefits for you both your body and mind? True False
Alenkasestr [34]

Answer:

I think the answer is True

6 0
2 years ago
Read 2 more answers
A heat engine operating between energy reservoirs at 20?c and 600?c has 30% of the maximum possible efficiency.
Anarel [89]
 <span>The maximum possible efficiency, i.e the efficiency of a Carnot engine , is give by the ratio of the absolute temperatures of hot and cold reservoir. 
η_max = 1 - (T_c/T_h) 

For this engine: 
η_max = 1 - [ (20 +273)K/(600 + 273)K ] = 0.66 = 66% 

The actual efficiency of the engine is 30%, i.e. 
η = 0.3 ∙ 0.664 = 0.20 = 20 % 

On the other hand thermal efficiency is defined as the ratio of work done to the amount of heat absorbed from hot reservoir: 
η = W/Q_h 

So the heat required from hot reservoir is: 
Q_h = W/η = 1000J / 0.20 = 5000J</span>
8 0
3 years ago
Two particles, each with charge Q, and a third charge q, are placed at the vertices of an equilateral triangle as shown. The tot
Gelneren [198K]

Answer:

<em>D. The total force on the particle with charge q is perpendicular to the bottom of the triangle.</em>

Explanation:

The image is shown below.

The force on the particle with charge q due to each charge Q = \frac{kQq}{r^{2} }

we designate this force as N

Since the charges form an equilateral triangle, then, the forces due to each particle with charge Q on the particle with charge q act at an angle of 60° below the horizontal x-axis.

Resolving the forces on the particle, we have

for the x-component

N_{x} = N cosine 60° + (-N cosine 60°) = 0

for the y-component

N_{y} = -f sine 60° + (-f sine 60) = -2N sine 60° = -2N(0.866) = -1.732N

The above indicates that there is no resultant force in the x-axis, since it is equal to zero (N_{x} = 0).

The total force is seen to act only in the y-axis, since it only has a y-component equivalent to 1.732 times the force due to each of the Q particles on q.

<em>The total force on the particle with charge q is therefore perpendicular to the bottom of the triangle.</em>

5 0
3 years ago
An oceanic depth-sounding vessel surveys the
IgorC [24]
So you would divide 1530 by 8 and that’s how you’d get your answer, so it should be (blank)m
3 0
3 years ago
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