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Gre4nikov [31]
2 years ago
15

A human heart beats once in 0.8 seconds. How many times it will beat in the life of 70 years.

Physics
1 answer:
Y_Kistochka [10]2 years ago
8 0

Answer:

Explanation:

108,000 beats per hour

613,200 hours in 70 years

108,000 times 613,200 =

66225600000 beats

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the temperature of a body fell from 100°c to 50°c in 10 minutes. the surrounding temperature was 20°c. what is the temperature a
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How would data look like for an arrangement with vertical square polarizer​
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For two polarizing filters to block out all light passing through them, one filter should be rotated 90 degrees from the other.

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Explanation:

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A concrete block (B-36 x10 °C-') of volume 100 mat 40°C is cooled to
ruslelena [56]
  • T1=40°C=313K
  • T_2=-10°C=263K

Applying Charles law

\\ \sf\Rrightarrow \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}

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\\ \sf\Rrightarrow V_2=\dfrac{26300}{313}

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6 0
2 years ago
Una carga de -10Mc está situada a 20cm delante de otra carga de 5 Mc. Calcular la fuerza electrostática en Newton ejercida por u
tino4ka555 [31]

Answer:

a)  force between them is attraction,   b)  F = 1.125 10⁻² N

Explanation:

In this case the electric force is given by Coulomb's law

          F =k \frac{q_1q_2}{r^2}

           

In the exercise they give us the values ​​of the loads

          q1 = - 10 mC = -10 10⁻³ C

          q2 = 5 mC = 5 10⁻³ C

           d = 20 cm = 0.20 m

let's calculate

          F = 9 10⁹ \frac{10 \ 10^{-3} \ 5 \ 10^{-3}}{0.20^2}

          F = 1.125 10⁻² N

To find the direction of the force we use that charges of the same sign repel each other, as in this case there is a positive and a negative charge, the force between them is attraction

7 0
3 years ago
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