The primary geographical feature that served as a boundary to westward settlement in 1760 was the Appalachian Mountains, since these were very high and treacherous and gave people very little incentive to cross.
1. natural resources (gold, waters) opened doors for trade / transportation
2. natural barriers, culturally isolated a group from one another (walls, tunnels)
^ both determined the rate of success or failure within the development of the early settlements in the English colonies
When burning, Yes.
A normal fire in a steel-frame building can soften the structure to the point of collapse.
Building laws / regulations require that all the structural steelwork is either covered in a protective coating (such as intumescent paint) or boxed in with fire-resistant plaster, so the fire can be extinguished before the building is weakened - or at least give people time to get out.
If that coating or plaster is damaged by impact or an explosion, the steel is exposed and the building can collapse relatively quickly.
(The common intumescent coatings just look like paint until exposed to fire, so the steelwork may appear to have no particular protection - but it always does).
Information:
http://www.steelconstruction.info/Fire_p...
See the images below - small buildings with steel-frame roofs after fires; you can see the amount of "sagging" and distortion on structures that have no particularly high loads.
These have burned long enough to destroy any protection, or they did not have any as the structure does not support occupied space.
http://www.champnews.com/Picture_Library...
http://thelincolnite.co.uk/wp-content/up...
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Answer:
Explanation:
Answer: It would be a fair assumption to make that a country with a large amount of natural resources would be more likely to develop fastest and furthest.
