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Ivanshal [37]
3 years ago
15

What is the definition for chemical change

Physics
2 answers:
katovenus [111]3 years ago
8 0
Chemical change<span> is any </span>change<span> that results in the formation of new </span>chemical<span> substances. At the molecular level, </span>chemical change <span>involves making or breaking of bonds between atoms.</span>
Leni [432]3 years ago
4 0
It is a change that results in a new chemical substance.
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Explanation:

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During the contraction of the heart, 65 cm3 blood is ejected from the left ventricle into the aorta with a velocity of approxima
vova2212 [387]

Answer:

The value  F  =  0.1396 \ N

Explanation:

From the question we are told that

   The volume blood  ejected is  V  =  65 \ cm^3  = 65*10^{-6} \  m^3

    The velocity of the blood ejected is  v  = 103 \  cm/s  = \frac{103}{100} = 1.03 \ m/s

    The density of blood is  \rho = 1060 \  kg/m^3

     The heart beat is R = 59 \  bpm(beats \  per \  minute) = \frac{59}{60}= 0.9833\ bps

The average force exerted by the blood on the wall of the aorta is mathematically represented as

      F  =  2 * \rho  *  V  *  R *  v

=>    F  =  2 * 1060  *  65*10^{-6}  *  0.9833 *  1.03

=>    F  =  0.1396 \ N

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3 years ago
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