Answer: The choice of a submarine to either sink or float depends on the captain of that submarine. For a submarine to sink the captain just have to allow water to fill the water tank (lock), making the submarine more dense than the water it has displaced. For it to float, it just have to empty the water tank and allow air to fill it.
When a boat in a canal lock sank, the water level will rise, because the volume of the boat has displaced more water, and this displaced water will cause the water level to rise. The space occupied by an object in a water, is equal to the volume of water been displaced.
Answer:
Territorial expansion of Russia
Explanation:
The territorial expansion of Russia began from 1500 with military conquest and by ideological and political unions in over five centuries until 1900. Expansion of Russia began from Khanate of Kazan in 1552 by Ivan the Terrible. In the late 18th century, Russia conquest Siberia. Territories from the Ottoman Empire and Poland took during the reign of Catherine the Great. Some of the other areas that add under the empire were Alaska, Eastern-Georgia, Azerbaijan, Armenia, Kazakhstan, Uzbekistan etc.
One government, a common language (english), and everyone has citizenship when born there.
Answer: A. Their cultural significance to humans
Explanation: Natural resources are popularly regarded as resources which exists by nature. Natural resources may be considered as resources which occurs without the actions or work of human. They may include sunlight, rain, wildlife natural resources beneath the surface gold, crude oil, diamond and so on.
There are variations in the distribution of natural resources from a geographic location or region to another as can be observed in the seasonal weather pattern, wildlife features and mineral resources available in the different regions of the world.
Protection of natural resources helps in maintaining a healthy and profitable environment. Most importantly it helps maintain our cultural value by helping us understand our past.
