Because rusting make the steel's structural strength became weak.
In construction, we use steel as a foundation that hold the building's structure. If we don't guard against the rusting of steel, we will expose the building to a very high potential risk of collapse
People were concerened at the state of our presidency. Many people saw Lincoln as an amazing president and it scared them to think of not having him anymore.
Hope I helped!
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<span>~ Zoe (Rank:'Genius')</span>
When the bat hits the ball, it exerts some force on the ball. Just think about a home run hitter hitting a stationary ball. How far do you think it will go? Will it go more than 400 ft.? Probably not. While the kinetic energy transferred from the bat to the ball accounts for some energy of the ball, it does not account for all. Where is the mysterious energy coming from?
The answer is conservation of momentum.
I just said momentum is conserved but how do I know that? I know that because of Newton's 2nd law: F=ma (Force equals mass times acceleration)
Conservation of momentum means that the harder you throw you, the harder the ball will bounce back at you. That is the reason it is easier to hit a home run on a fast ball than a curveball.
Conservation of momentum also means that the bat can transfer some of its momentum to the ball. This is why it is better to use a heavier bat if you swing just as fast. The momentum is the product of the mass and velocity, so to make it easier to understand; a heavier bat swung at the same speed as a lighter bat will have more momentum.
The treaties between whites and Native Americans began in the late 1700's and lasted nearly a century. At this time, Native Americans were considered sub-humans, not worthy of the land that they used to own. There was certainly a pattern in the treaties between these two ethnic groups. A pattern of violence and displacement. After the Natives were forced to move to the southern part of the country, the white americans discovered diamonds in the mountains of Texas and gold in California (the gold rush) and again the Natives were violently removed from these parts of the land. The Destiny Manifest played a major part in the mistreatment of the Native Americans in the 1800's.
