The Uruguay River
An artificial boundary is a boundary made by humans, examples include dams, the fence at the border between the U.S and Mexico. A natural boundary is a boundary made by nature, a boundary that "happens" naturally, examples include rivers, mountains and such.
yes
Nature has provided the Pyrenees Mountains as the boundary between France and Spain.
The Amazon River in South America is an example of a natural boundary. It is a natural boundary because it is formed by a physical feature of the landscape, in this case, a river, that defines the border between different regions or countries.
the difference between a political and a physical boundary is that a physical map shows geographical features like mountains and rivers while a political map shows boundaries. One is made by people(politicians), the other by nature. So , occasionally, a political boundary will be a straiight line but there are no straight lines in nature. A river is a common and convenient, physical boundary with two obvious sides. Sometimes, a river may run between two countries and thus becomes an example of a physical boundary serving as a political boundary.A mountain range may serve a similar purpose.
When waves encounter a boundary between two different media, they can either reflect, transmit, or refract. This behavior is governed by the difference in the properties of the two media, such as their densities or refractive indices. The angle of incidence and the nature of the wave (e.g. electromagnetic or mechanical) also play a role in determining how the wave will behave at the boundary.
An artificial boundary is a boundary that is man made instead of naturally formed by nature. These boundaries include fences and dams.
When a wave hits a free boundary, it reflects back in the opposite direction. The wave's amplitude and phase may change depending on the nature of the boundary.
The Nature of Nicholas - 2002 is rated/received certificates of: Argentina:13
Second Nature - 2003 TV is rated/received certificates of: Argentina:13
A natural boundary is a boundary that is defined by natural features, such as a strait, a mountain range etc. A physical boundary is can be an imaginary boundary that is drawn on a map, which is not shown in real life, something like a political boundary.
an unprotected one......... =================== The Canada US border has been described as an "undefended" border, but it is by no means an "unprotected" one. Even the "undefended" nature of the border is now questioned by many.