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ArbitrLikvidat [17]
3 years ago
6

How much time does it take for an eagle flying at a speed of 50 kilometers per hour to travel a distance of 2000 kilometers?

Physics
1 answer:
gtnhenbr [62]3 years ago
8 0

Answer:40 hour

Explanation:

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A rock falls from the top of a hill to the bottom. The total energy of the rock at the top isn’t the same as the sum of its pote
mart [117]

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A) some of the rocks energy is transformed to thermal energy

Explanation:

If we neglect air resistance during the fall of the rock, than the mechanical energy of the rock (which is sum of its potential energy and its kinetic energy) would be constant during the entire motion, so the total energy of the rock at the top would be the same as the sum of its potential energy and kinetic energy at the bottom.

However, this not occurs, due to the presence of air resistance. In fact, air resistance acts against the fall of the rock, and because of the friction between the molecules of air and the surface of the rock, the rock loses part of its energy. This energy is converted into thermal energy of the molecules of the air.

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When does acceleration due to gravity equal 9.8 m/s downward?
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Answer:

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Consider a long rod of mass, m, and length, l, which is thin enough that its width can be ignored compared to its length. The ro
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Answer:

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The rod will act as pendulum for small oscillation .

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b )

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.5 ω² l = g ( 1 - cosθ )

1 - cosθ  = .5 ω² l /g

cosθ = 1 - .5 ω² l /g

θ can be calculated , if value of l is given .

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