... rolled across the floor. The floor surface resists the motion of the rubber ball surface. This resistance or friction will slow down the moving object and eventually bring it to a stop. Friction exists between any two surfaces that touch, slide, or roll on one another. Any change in an object’s speed is called acceleration. An increase in speed is called positive acceleration, while a decrease in speed is called negative acceleration, or deceleration. Acceleration can also mean a change in direction as well as in speed. A force is needed to change the direction of an object, so a change in force can also mean a change in direction as well as a change in spee ...
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... neutrons produced that will split more atoms. As this process is repeated over, it becomes a self-sustaining chain reaction. This energy producing process is called a chain reaction. uses the uranium-235 element because it is the easiest of all atoms to split apart. Uranium-235 is made up of many protons and few neutrons. Protons naturally repel one another so a nucleus made up of many protons tends to ‘fly apart’ more easily. In addition, uranium makes a good nuclear reactor because it can sustain a series of fission reactions, each time producing more neutrons in chain reaction. Therefore, uranium-235 can produce a steady flow energy output. Uranium can be ...
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... thought of killing a little baby is disgusting and unthinkable. This is where I stand, and the only solution I can come up with is the total ban of altogether. This task should not be a hard one, but it might take some time. My plan calls for the closing and the illegalizing of abortion clinics, and the prosecution of people who perform these deeds. As with any big descion we must consider the opposing views. One reason that the debate on what we should do about doesn’t go anywhere, is because each side focuses on a different topic. We make no progress because we are not talking about the same thing. The anti-abortionists are focused on the fetus’ rights, ...
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... take note: these are not the imaginings of some Disney screen-16 writer. Decades ago Konrad Lorenz, a famed Austrian naturalist, made detailed studies of Greylags and afterwards showed no hesitation in using words like love, grief and even embarrassment to describe the behavior of these large, social birds. At the same time he did not forget that all romance - animal and human - is tied intimately to natural selection. Natural selection brought on the evolution of males and females during prehistoric epochs when environmental change was making life difficult for single-sex species such as bacteria and algae. Generally, these reproduced by splitting into ident ...
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... concluded that the deflections of the alpha particles were caused by a center of positive charge that contained most of the atom's mass (the nucleus). He also explained that the particles that went straight through the foil did so because the atom is mostly empty space and that the distance between electrons and the nucleus is vast compared to the size of the nucleus itself. In 1919, he discovered the "artificial disintegration" of nitrogen. His experiments show that under alpha radiation, nitrogen is decomposed and hydrogen is formed. Rutherford also devised an electrical method for counting the number of alpha particles emitted from radioactive substances. ...
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... field of the black hole prevents any light or other electromagnetic radiation from escaping. But where lies the “point of no return” at which any matter or energy is doomed to disappear from the visible universe? The black hole's surface is known as the event horizon. Behind this horizon, the inward pull of gravity is overwhelming and no information about the black hole's interior can escape to the outer universe. Applying the Einstein Field Equations to collapsing stars, Kurt Schwarzschild discovered the critical radius for a given mass at which matter would collapse into an infinitely dense state known as a singularity. At the center of the black h ...
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... a home range of its own. Home ranges house several burrows, that are located along the river bank. There are two different types of burrows, dwelling burrows, and nesting burrows. The nesting burrows are used for rearing young, and the other dwelling burrow is used by both sexes as a place to rest, sleep and eat. Burrows have a problem with maintaining a flow of air through them. If a platypus stays in a burrow for too long it will begin to use up its supply of oxygen. The nesting burrow has an entrance above water level to increase oxygen supply, whereas the dwelling burrows are located below water level. has a bill like a duck, and a tail like a beaver. ...
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... This is probably one of the biggest questions for this topic because people keep on dumping waste in the water and this is probably the biggest threat to our oceans because of people throw stuff in our oceans. This question was also good to ask for this topic because this question has a lot of answers and solutions for it like what can people in the First World do to help the Third World people out. The books and my resources found many ways to finish off this problem. I also found some insight to this problem. The resource which helped me a lot was the internet because it had the most up to date news or studies about this problem even newer than stuff i ...
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... products and production of spare body parts. Firstly, selective breeding throughout the ages has served humanity in many ways. The origins of cloning lie in the agricultural history of humanity. Therefore the perceived gap between cloning and our nature are not so distant, as cloning has been the means by which humankind has cultivated flora for a millennia. In addition, selective breeding has been the means by which humankind has manipulated fauna for its own ends. In both cases genetic manipulation does serve humanity on many practical levels. Secondly, humankind has genetically engineered many species through selective breeding. The potential of cloning in food ...
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... pigment found in vegetables such as carrots. A diet that is lacking in Vitamin A depreciates a person’s ability to see in the dark. Which is where the saying that carrots will make you see better is derived from. Carrots were the vegetables chosen to be tested in this experiment. This experiment was designed to test if the processing of a carrot produces gas. In turn discovering the health related differences of canned, frozen and fresh carrots. Canning is a process of hermetically sealing cooked food for future use (Encyclopedia.com, 1999). This process is also called sterilization because it involves exposing the food to high temperatures for only minutes or s ...
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