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dexar [7]
3 years ago
10

What causes a bolt of lightning?

Physics
2 answers:
xxTIMURxx [149]3 years ago
7 0

It;s not alot of people say it's C

gladu [14]3 years ago
4 0
I think the correct answer from the choices listed above is option D. A bolt of lightning is caused by e<span>lectrical charges building up in the space between the clouds and the ground. Hope this answers the question. Have a nice day.</span>
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The bird is held in level flight due to the force exerted on it by the air as the bird beats its wings. What is the maximum valu
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Answer:

 maximumforce is F = mg

Explanation:

For this case we must use Newton's second law,

     Σ F = m a

bold indicate vectors, so we will write it in its components x and y

 X axis

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 Axis y

      Fy - W = m aa_{y}

Now let's examine our case, with indicate that the bird is level, the force of the wings can have a measured angle with respect to the x axis, where the vertical component is responsible for the lift, let's use trigonometry to find the components

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      Fₓ = F cos θ

      sin θ = Fy / F

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Let's replace and calculate

      F sin θ -w = m a

 

As the bird indicates that leveling at the same height, so the vertical acceleration is zero (ay = 0)

       F sin θ = w = mg

The maximum value of this equation occurs when the sin=1, in this case

      F = mg

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