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Julli [10]
3 years ago
14

Which chemical reaction absorbs energy

Physics
2 answers:
kondaur [170]3 years ago
8 0

Answer:

endothermic reactions

Slav-nsk [51]3 years ago
8 0

Answer:

endothermic reactions

Explanation:

endothermic reactions means the reaction gets super hot while the surrounding area gets colder. (absorbs energy)

exothermic means the surrounding area gets hot while it gets colder. (releases energy)

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Your friend tells you that a shiny element has to be a metal. Do you agreed? Explain your reasoning
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In a ballistics test, a 24 g bullet traveling horizontally at 1200 m/s goes through a 31-cm-thick 320 kg stationary target and e
Zanzabum

Answer:

The  velocity is  v_t  =  0.02175 \  m/s

Explanation:

From the question we are told that

   The  mass of the bullet is  m_b  =  0.024 \  kg

    The initial speed of the bullet is  u_b  =  1200 \  m/s

   The mass of the target is  m_t  =  320 \  kg

    The  initial velocity of target is  u_t  =  0  \ m/s

    The  final velocity of the bullet is  is  v_b  =  910 \  m/s

   

Generally according to the law of momentum conservation we have that

      m_b *  u_b  +  m_t *  u_t  =  m_b *  v_b  +  m_t  *  v_t

=>   0.024  *  1200  +  320 *  0  =  0.024 *  910   +  320  *  v_t

=>    v_t  =  0.02175 \  m/s

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Why do flames go upwards​
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Which can happen during a physical change?
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C.<span>Molecules can move more rapidly and freely and change states.
</span>
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Answer:C

Explanation:

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