3 years ago

What conditions are required for resonance to occur?

Physics

2 answers:

Citrus2011 [14]3 years ago

7 0

Answer:

B: a wave with the same amplitude as the object's natural frequency

Explanation:

took the test

CaHeK987 [17]3 years ago

3 0

B: A Wave with the same natural wavelength as an object's frequency

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makkiz [27]

Answer:

3.38 m/s

Explanation:

Mass of child = m₁ = 25

Initial speed of child = u₁ = 5 m/s

Initial speed of cart = u₂ = 0 m/s

Mass of cart = m₂ = 12 kg

Velocity of cart with child on top = v

This is a case of perfectly inelastic collision

$m_1u_1+m_2u_2=(m_1+m_2)v\\\Rightarrow v=\frac{m_1u_1+m_2u_2}{m_1+m_2}\\\Rightarrow v=\frac{25\times 5+12\times 0}{25+12}\\\Rightarrow v=\frac{125}{37}\\\Rightarrow v=3.38\ m/s$

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In the doorknob shown above, when the handle is rotated a distance of 189 millimeters, the spindle is rotated a distance of 27 m

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