In a 2 page essay, explain the origin, development, struggle, and Essay

In a 2 page , explain the origin, development, struggle, and future of the communities and cities in our country over the past 200 years - Essay Example In half of the 18th century, there was totally disturbance in the political section of the United States. Slavery was so much common in the United States. Declaration of independence was written by Thomas Jefferson who himself had more than 200 slaves. In 1787, the constitution convention explains the rights of blacks in the society. According to that they did not have a right to vote as well as they did not take admission in public schools. After 20 years after the revolution many Southern freed their slaves. When the United States grew, slavery was also extended. In 1793, cotton gin was invented which, permitted the cultivation of short staple cotton in Inland areas. In 1830, majority of the blacks were free in thee United States approximately they were319, 000. Many of the people in the black community lived in poverty, but some had established their successful bossiness (Smallwood,

Water Chemistry Essay Example | Topics and Well Written Essays - 250 words

Water Chemistry - Essay Example Solutions Polysaccharide- these are polymers that are made of several chains of either monosaccharide units or disaccharide units Glucose- this is an example of a monosaccharide. It is a simple sugar consisting of a hydroxyl group (OH) in the structure. Glucose structure Amino acids- organic compounds with an amino group (NH2) and a carboxyl group (COOH). Fats- organic compounds with carbon, hydrogen and oxygen present in their structure. Fats contain glycerol which houses hydroxyl (OH) group and fatty acids which houses carboxyl (COOH) group. Proteins- Contain carbon, hydrogen and oxygen in their structure. Proteins consist of both amine (NH2) and carboxyl (COOH) groups. #2 Solutions (a) Entropy- this is a measure of how much a system is disordered. Denoted by S. (b) Enthalpy- this is the product of pressure of a system and volume of a system added to the internal energy of a system. (c) Gibbs Free Energy- this is the product of entropy and absolute temperature subtracted from the e nthalpy of a system. (d) Exothermic reaction- this is a chemical reaction in which energy is released in the form of either light or heat. Endothermic reaction- this is a chemical reaction where energy is absorbed from the surrounding. The energy can be in form of heat but not in all cases.