Answer: The motions shifts.
An electron that is far away from the nucleus have higher energy than an electron near the nucleus. Nucleus are positively charged and those electrons near it get attracted; those electrons gain kinetic energy hence reducing their internal energy. The electrons far from nucleus have low kinetic energy hence more internal energy.
<span>Cobalt-60 is undergoing a radioactivity decay.
The formula of the decay is n=N(1/2)</span>∧(T/t).
<span>Where N </span>⇒ original mass of cobalt
<span> n </span>⇒ remaining mass of cobalt after 3 years
T ⇒ decaying period
t ⇒ half-life of cobalt.
So,
0.675 = 1 × 0.5∧(3/t)
log 0.675 = log 0.5∧(3/t)
3/t = log 0.675 ÷log 0.5
3/t= 0.567
t = 3÷0.567
= 5.290626524
the half-life of Cobalt-60 is 5.29 years.
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Answer:
Change in potential energy is 700.7 J.
Explanation:
Given:
Mass of the object is, 
kg
Height to which the object is raised above his head, 
m
Acceleration due to gravity is, 
m/s²
We know that for a mass 
raised to a height 
, the change in potential energy is given as:
, where, 
Now, plug in the given values and solve.
Therefore, the change in the potential energy is 700.7 J.
