Exploitation of a resource only occasionally leads to greater development
What will be an ideal response?
This is true. The result depends on politics and political will. Many oil-rich
countries have seen their riches sequestered in Swiss banks by corrupt leaders. The same is
true of the diamond trade. Only when the population shares substantially in the wealth is
there a good chance that development will occur.
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List guidelines for selecting images. Describe methods for ensuring your web images are usable and accessible. ?
What will be an ideal response?
A 777 aircraft has a mass of 300,000 kg. At a certain instant during its landing, its speed is 27.0 m/s. If the braking force is 435,000 N, how much further does it travel along the runway before it comes to a stop?
A) 40.5 m B) 142 m C) 181 m D) 251 m E) 456 m
A light ray bends when it goes from one medium to another because of diffraction
Indicate whether the statement is true or false
If a reflected ray in air at an angle of reflection of 60 
is totally polarized, what is the index of refraction of the reflecting material?
A. 1.50 B. 2.00 C. 1.73 D. 1.15 E. this angle is not possible for an incident ray in air