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3 years ago

6

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! What types of waves are Sound Waves?

1 answer:

Eduardwww [97]3 years ago

3 0

Your answer would be D. Mechanical and Pressure/Longitudinal. This is because a sound wave is usually a type of pressure wave caused by the vibration of an object in a conductive medium such as air. These waves are also mechanical because they require a medium to travel through. This is also why sound simply cannot travel through vacuums like space, because they have no mediums in which sound can travel through.

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Answer:

Explanation:

Given

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mass of bus travelling in South direction is $m_2=1.578\times 10^4 kg$

speed of bus $v_2=12.2 km/h\approx 3.38\ m/s$

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$P_2=m_2\times v_2+n\cdot m_0\times v_2$

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For total momentum to be towards south

$P_2-P_1$ should be greater than 0

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$P_2=P_1$

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$n=\frac{4243.6686}{64.8}=65.48\approx 66$

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3 years ago