Explanation:
The pH of the solution is 9.63 ± 0.03.
we know that
pH= -log[H+]
⇒[H+] =
=
= 
Now to find absolute error we use the formula
Absolute error/[H+] =ln10(uncertainity)
Absolute error = ln10×[H+] ×0.03

=
The cause of the earths magnetic field is generated from deep down in the core of the earth.
Answer:
Under water for at least five years and then often in dry storage
Deep geological disposal
world-nuclear.org