Answer:
it should be the A. the crust
<h2>Hello!</h2>
The answer is: The mass number of an atom is obtained by totaling the number of protons and neutrons.
<h2>
Why?</h2>
The atomic mass can be calculated by the sum of the protons and neutron mass of an element.
We should not confuse the atomic mass with the relative atomic mass since the relative atomic mass of an element is the average mass of its particles/atoms compared to 1/12th the mass of a carbon-12 particle/atom.
Have a nice day!
Answer:
the us and Iran are at odds past history like the iran nuclear deal
Tarbela dam is the largest Earth filled dam in the world. It is buolt on river Indus, in Pakistan. Its primary use is electricity generation and supply water for irrigation by storing flows during the monsoon period and use it during the low flow period in the winter . Due to the lower rate of sedimentation, the useful life time of the dam has increased to 85 years.
Here, the option that is not valid is
D. It will be able to supply irrigation water for centuries.
