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The rate of doing work is called power of an object.
It is also defined as the work done by an object per unit time. Mathematically, its formula is given by :
, W is work done and t is time taken.
The SI unit of power is watts and its commercial unit is kWh.
1 watt = J/s or N-m/s.
The half life, this is how long it takes for half of the atoms to decay
Chlorophyll is the main pigment in a spinach leaf because it is a green plant and chlorophyll gives off a green color
Explanation:
For the given reaction 
Now, expression for half-life of a second order reaction is as follows.
....... (1)
Second half life of this reaction will be
. So, expression for this will be as follows.
=
...(2)
where
is the final concentration that is,
here and
is the initial concentration.
Hence, putting these values into equation (2) formula as follows.
=
=
...... (3)
Now, dividing equation (3) by equation (1) as follows.
=
= 3
or,
= 3
Thus, we can conclude that one would expect the second half-life of this reaction to be three times the first half-life of this reaction.