The Rust Belt is an informal region referring to a an area that has experienced dramatic decline in its industry.
Explanation:
The Rust Belt is an area, or rather informal region in the United States. It has nothing to do with the climate characteristics of the area, but it got its name because of the drastic decline of the industry. This ''region'' is not only occupying territory in the northern Midwest, but it stretches as east as New York, and as west as Wisconsin.
Staring from the 80's, a belt like area along the northern part of the United States started to have sharp decline in its industry. The once powerful industrial centers suffered greatly, as the decline of the industry had major impact on the economy, lot of population moved out, and the places stagnated or even degraded. The most affected area was the Great Lakes region. The states where the ''Rust Belt'' goes through are:
- New York
- Pennsylvania
- West Virginia
- Ohio
- Indiana
- Michigan
- Illinois
- Iowa
- Wisconsin
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Answer:
C) X=100%; Y=0%
B) X=50%; Y=50%
Explanation:
The oldest rocks on Earth are about four billion years old. When a rock forms, it contains unstable isotope and no daughter isotopes, so every rock will contain 100% parent isotope and 0% daughter isotope.
The half-life of the radioactive isotope Of this particular rock is 5730 years. The half-life is an amount of time needed for half of the parent isotope (50%) to become a daughter isotope. In this case, after 5730 years, half of the initial parent isotope will transform to daughter isotope, which means that after 5730 years, there will be 50-50 of the parent and daughter istotopes presented in the rock. After two half-lives, there will be only 25% of the parent isotope remaining (that’s half of the previous 50% which remained after first half-life), and after three half-lives, there will be only 12,5% of the parent isotope remaining and so on.
Answer:
About 16 times the energy of the second.
Explanation:
This can be explained thanks to the Stefan-Boltzmann law, which relates temperature directly to the amount of energy released by an object.
With this law in mind, the total energy radiated during 1 second from 1 square meter of any object, equals <em>a constant </em>(5.670374419 × 10−8 watt per meter2 per K4) times the temperature raised to the fourth power. the equation is:
E = σT4
Since the first star is twice as hot as the second, then the star won't produce twice the energy, but 16 times the energy due to the Stefan-Boltzmann constant. It's also important to know that this law only applies to blackbodies.
I think the answer is c I hope this helps
