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kolezko [41]
3 years ago
10

When hot and cold air meet, the hot air rises to the top. What causes the hot air to rise???

Physics
1 answer:
vekshin13 years ago
3 0
Hot air rises<span> because when you </span>heat air<span> (or any other gas for that matter), it expands. When the </span>air<span> expands, it becomes less dense than the </span>air<span>around it. The less dense </span>hot air<span> then floats in the more dense cold </span>air<span> much like wood floats on water because wood is less dense than water.</span>
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The graphic organizer above shows that the properties of waves are influenced by the energy of waves. Name 2 properties of waves
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Max and Jimmy want to jump on a trampoline. Max begins jumping in a steady pattern, making small waves in the trampoline. Jimmy
mylen [45]

Answer:

x_total = (A + B) cos (wt + Ф)

we have the sum of the two waves in a phase movement

Explanation:

In this case we can see that the first boy Max when he enters the trampoline and jumps creates a harmonic movement, with a given frequency. When the second boy Jimmy enters the trampoline and begins to jump he also creates a harmonic movement. If the frequency of the two movements is the same and they are in phase we have a resonant process, where the amplitude of the movement increases significantly.

         Max

               x₁ = A cos (wt + Ф)

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              x₂ = B cos (wt + Ф)

         

total movement

             x_total = (A + B) cos (wt + Ф)

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3 years ago
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A 5.75 mm high firefly sits on the axis of, and 11.3 cm in front of, the thin lens A, whose focal length is 5.77 cm . Behind len
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Answer

given,

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\dfrac{1}{f} = \dfrac{1}{p} + \dfrac{1}{q}

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\dfrac{1}{f} = \dfrac{1}{p} + \dfrac{1}{q'}

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Answer:

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