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Aloiza [94]
4 years ago
5

Why does a hot air balloon fall when the air inside is not heated​

Physics
1 answer:
trapecia [35]4 years ago
7 0
A hot air balloon rises in the first place because the air inside is hot, which rises. So, if the air inside is not heated, it fails to rise and falls. Warm air rises because the particles get excited and jiggle with the heat, and cause the air to take up more space. So, as the surrounding air is probably colder and denser, the less dense hot air rises up in the hot air balloon.
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We can compare these two interactions on the basis of impulse (see above), but sometimes, we are more interested in the forces (
kiruha [24]

Complete Question

The complete question is shown on the first uploaded image

Answer:

a

 I =  476 \ N \cdot s

b

 I_1 =  14.21 \  N\cdot s

c

    F  = 20300 \  N

Explanation:

Considering the first question

From the question we are told that

   The force produced is F  =  3400 \ N

   The duration of the punch is  t =  0.14 \  s

Generally the impulse delivered is mathematically represented as

    I =  F  *  t

=>    I =  3400  *  0.14

=>    I =  476 \ N \cdot s

Considering the second  question

   The approaching velocity of the ball is  v_b  =  45 \ m/s

    The leaving  velocity of the ball is  v_l  =  -53 \ m/s

     The mass of the ball is  m_b  =  0.145 \  kg

Generally the magnitude of the impulse delivered is mathematically represented as

     I_1 =  m*  v_b  - m *  v_l

=>     I_1 =  [0.145 *  45]  - [0.145 * -53]

=>     I_1 =  14.21 \  N\cdot s

Considering the third  question

     The  duration of the impact of the bat is  t _1 =  0.7 \ ms  =  0.7 *10^{-3} \  s

      Generally the average force exerted by the bat is mathematically represented as  

       F  =  \frac{I_1}{t_1}

=>     F  =  \frac{14.21 }{0.7 *10^{-3}}

=>       F  = 20300 \  N

 

7 0
4 years ago
If you fell 90ft while sitting down strapped in an elevator (think tower of terror ride) would you die when the elevator hit the
8_murik_8 [283]

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Person inside free falling elevator could experience 0G or no gravity effect something similar to what astronauts experience in earth's orbit.

The only damage that could happen to you is when the breaks are released you won't feel 0G anymore and fall about 4ft to the floor of the elevator.

Hope this helps.

r3t40

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Scientists<span> use the </span>scientific method<span> to make testable explanations and predictions about the world. A </span>scientist<span> asks a question and develops an experiment, or set of experiments, to answer that question. 

</span><span>Ask a QuestionDo Background ResearchConstruct a HypothesisTest Your Hypothesis by Doing an ExperimentAnalyze Your Data and Draw a ConclusionCommunicate Your Results</span>
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Lithium
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Answer:d

Explanation:

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