such as methane‚ however‚ have weak cohesion due only to Van der Waals forces that operate by induced polarity in non-polar molecules. Cohesion‚ along with adhesion (attraction between unlike molecules)‚ helps explain phenomena such as meniscus‚ surface tension and capillary action. Mercury in a glass flask is a good example of the effects of the ratio between cohesive and adhesive forces. Because of its high cohesion and low adhesion to the glass‚ mercury does not spread out to cover the bottom
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“Let us give the children a vision of the universe‚” Wrote Maria Montessori in To Educate the Human Potential. “The universe is an imposing reality and the answer to all questions.” Montessori observed firsthand children’s eagerness to understand themselves‚ their world‚ and their place in it. It was her hope that Cosmic Education would allow children to grow into responsible sons and daughters of the great human family with the understanding‚ ethics and self-knowledge needed to transform the
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EARTH the planet on which we live land as opposed to the sea‚ the air‚ etc. the material in which plants grow the inhabitants of this planet‚ especially the human inhabitants: The planet on which we live; the world: “the diversity of life on earth”. The earth is the third planet from the sun in the solar system‚ orbiting between Venus and Mars at an average distance of 90 million miles (149.6 million km) from the sun‚ and has one natural satellite‚ the moon. It has an equatorial diameter of 7‚654
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Graphs‚ Groups and Surfaces 1 Introduction In this paper‚ we will discuss the interactions among graphs‚ groups and surfaces. For any given graph‚ we know that there is an automorphism group associated with it. On the other hand‚ for any group‚ we could associate with it a graph representation‚ namely a Cayley graph of presentations of the group. We will first describe such a correspondence. Also‚ a graph is always embeddable in some surface. So we will then focus on properties of graphs
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When you consider the options available‚ laser body sculpting seems to be a much wiser choice than traditional liposuction. Traditional liposuction has a twenty year history‚ and the benefits‚ as well as side effects have been well proven and studied over the years. Laser body sculpting‚ on the other hand‚ has only been available for a short time. It was only approved in North America in 2007. This raises concerns amongst some physicians. Some think that the fatty acids that are released have the
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THE EARTH At the beginning our planet is no more than a case of fire and cloud with glutenated dust particles similar to so many similar cloisters in the universe. This was the miracle where our life exists in this universe. Today life our life is just a link or chain of so many numerable living beings that was succeeded one another honours over nearly 4 billion years and even today new volcanoes continue to sculpt our landscapes it appears like molten rocks from the depths‚ solidifying‚ cracking
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mix the non-living‚ abiotic components like soil‚ climate and water‚ and take in the complex interrelationships among the organisms and the environment‚ and we are closer to an actual understanding of this ecosystem. With one third of the Earth’s surface is covered with forests it is no surprise that they are among the most notable storehouses of biological diversity on the planet. Forests have a variety of uses to humans‚ including wood from trees‚ nutrition from animals‚ grazing‚ recreation‚ medicinal
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Formulas of Surface area and Lateral surface area of Polyhedrons LSA or Lateral Surface Area refers to the sum of the areas of all the faces of a three-dimensional figure‚ excluding its bases. SA or Surface Area- refers to the sum of the areas of all the faces of a three-dimensional figure. It also referred to as the Total Surface Area (TSA). ~~~~~~~~~~~~~~~~~~~ For Rectangular Prism LSA= P(h) *where P=perimeter of the base ; h= measurement of the height SA= 2B+ LSA *where
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climate? Ans. When Earth’s orbit is elliptical‚ Earth encounters more variation in energy from the Sun. The tilt of the Earth’s axis also changes. When the tilt decreases‚ temperature differences between seasons decreases. Wobbling of Earth changes the direction of tilt and can reverse the seasons. 3. How changes in CO₂ concentrations affect global temperatures. Ans. Carbon dioxide is a greenhouse gas that absorbs heat radiated by Earth’s surface. Increasing carbon dioxide could increase the greenhouse
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There is a fact that our planet is protected and supported by the tree all over the world. With the recent uncontrolled forest exploiting‚ some people think that this possibly leads to the end of the earth. In my point of view in this essay‚ if people keep destroying this green natural resource‚ they will soon face many serious consequences such as global warming‚ disaster‚ or even extinction. Firstly‚ it’s knowledgeable that people now have to suffer the climate change resulted by greenhouse
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