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irga5000 [103]
4 years ago
7

When a wave strikes a new medium, three things can happen: reflection, transmission, and absorption. Consider an echo. Do you th

ink reflection is an important process when sound waves produce an echo?
Physics
1 answer:
kolbaska11 [484]4 years ago
7 0

Answer:

YES

Explanation:

An echo may be defined as a sound which is repeated because of the sound waves that are produced are reflected back after striking a surface. Sound waves can smoothly bounce off the hard objects in the same manner as a rubber ball bounces back the ground.

When a sound wave strikes a hard surface, the sound waves gets reflected back and bounces back to the observer and produces an echo. If the sound waves strikes a soft surface it absorbs the sound.

Although the direction of a sound changes but the echo sounds in the same way as the original sound.

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A tabletop gamer has designed a game that requires three dice to be thrown onto a tray with a measurement grid. To add an extra
Airida [17]

Answer:

The resulting coordinate is   (x,y) =  (-0.170 \ m  ,  -0.038 \ m )

Explanation:

From the question we are told that  

     The  mass of the first dice is  m_1 =  11.10 \ g

      The  mass of the second dice is  m_2  =  15.10 \ g

     The mass of the third dice is  m_3 =  18.90 \ g

     The coordinate of the first dice is (x_1, y_1) =  (0.3150\ m  ,  -0.4990 \ m  )

     The coordinate of the second dice is  (x_2,y_2) =  (-0.4050  \ m  , 0.4850 \ m  )

      The coordinate of the third dice is  (x_3 , y_3) =  (-0.1150 \ m ,  -0.1850\ m )

Generally the resulting coordinate of the center of mass of the dice in the x-axis is mathematically evaluated as

        x\ cm  =  \frac{m_1 * x_1 + m_2 * x_2 + m_3 * x_3}{m_1 + m_2 +m_3 }

i.e the summation of the moments about their x-axis divided by the magnitude of their masses

    substituting values

         x\ cm  =  \frac{11.0  * 0.3150 + 15.10 * (-0.4050) + 18.90 * (-0.1150)}{11.100 + 15.10 +18.90 }

        x\ cm  = -0.170 \ m

Generally the resulting coordinate of the center of mass of the dice in the y-axis is mathematically evaluated as

     y\ cm  =  \frac{m_1 * y_1 + m_2 * y_2 + m_3 * y_3}{m_1 + m_2 +m_3 }

     y\ cm  =  \frac{ 11.10 * (-0.4990) + (15.10) * (0.4850) + (18.90) * (-0.1850)}{ 11.10 + 15.10 +18.90 }

     y\ cm  =  -0.038 \ m

Thus the resulting coordinate is   (x,y) =  (-0.170 \ m  ,  -0.038 \ m )

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3 years ago
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