3 years ago

Which direction do all waves travel?

1 answer:

7 0

They travel the way the wind is blowing and also towards the shoreline

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xxMikexx [17]

Answer:

The other child must sit the same meters as the N child so they an be balanced.

Explanation:

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3 years ago

Yuliya22 [10]

The answer to your quistion will be 75%

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3 years ago

DerKrebs [107]

A surf forms when waves get too high and "break"

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3 years ago

Marina CMI [18]

Answer:

D) 50%

Explanation:

According to conservation of momentum:

$m_{1} v_{1i} + m_{2} v_{2i} = m_{1} v_{1f} + m_{2} v_{2f}$

Assuming that the second taffy started at rest, both pieces have the same mass and that they combined after the collision, their final velocity is:

$m v_{1i} = (m+m) v_{f}\\v_{f} = 0.5 v_{1i}$

The initial kinetic energy of the system is:

$E_{ki} = \frac{m*v_{1i}^2}{2}$

Since the second taffy was not moving, it had no kinetic energy at first.

The initial kinetic energy of the system is:

$E_{kf} = \frac{2m*v_{f}^2}{2}\\E_{kf} = \frac{2m*(0.5v_{1i})^2}{2}\\E_{kf} = \frac{0.5m*v_{1i}^2}{2}$

The percentage of kinetic energy that becomes heat is given by:

$H=1 - \frac{E_{kf}}{E_{ki}}\\H=1 - \frac{\frac{0.5m*v_{1i}^2}{2}}{\frac{m*v_{1i}^2}{2}}\\\\H=1- 0.5 = 0.5$

THerefore, 50% of the kinetic energy becomes heat

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3 years ago

aleksandr82 [10.1K]

The correct answer is D) Nuclear fusion

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3 years ago