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3 years ago

The half-life of a certain isotope is 12 years. How much of a 600 g sample will remain after 36 years?

Physics

1 answer:

miskamm [114]3 years ago

8 0

36/12= 3 3 IS THE AMOUT OF HALFLIVES

ONE HALF LIFE = 300

TWO HALF LIFE = 150

THREE HALF LIFE = 75

*Divide 600 three times

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yanalaym [24]

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That's IF the force was in the same direction as the 4m of motion.
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Answer:

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Explanation:

Work is defined in physics as the force that is applied to a body to move it from one point to another.

The total work W done on an object to move from one position A to another B is equal to the change in the kinetic energy of the object. That is, work is also defined as the change in the kinetic energy of an object.

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$Ec=\frac{1}{2} *m*v^{2}$

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The work (W) of this force is equal to the difference between the final value and the initial value of the kinetic energy of the particle:

$W=\frac{1}{2} *m*v2^{2}-\frac{1}{2} *m*v1^{2}$

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In this case:

W=?
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v1= 25 $\frac{m}{s}$

Replacing:

$W=\frac{1}{2} *2145 kg*((12\frac{m}{s} )^{2}-(25\frac{m}{s} )^{2})$

W= -515,872.5 J

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