The quartz is more resistant to abrasion and chemically more resistant than the feldspar. The result is that the quartz remains in the stream but the feldspar breaks down to clay or is dissolved.
(this is from coursehero.com)
A wave will travel only as long as it has energy to carry. The energy makes a wave travel and it will stop traveling as soon as the energy is dissipated.
Answer:
I am totally against it as this type of divisions are creating differences and animosity among people, and are sometimes even leading to conflicts. I especially disagree with it from today's perspective, as people today are moving and migrating more and more and therefore the existence of nation states is nonsense.
Explanation:
I think that we should strive to the creation of political arrangements as we have in European Union.
A larger market without boundaries, with certain individualities should be something that is acceptable to all of us.
We should not create differences, but try to overcome them.