Essay Database

… been a growing problem in America. More and more mothers are doing careless acts, which is slowly damaging their unborn child. Many of these mistakes can be fixed. The leading causes of birth defects is alcohol intake during birth, tobacco and…

… the remains of a massive star that has collapsed and shrunk to a tiny point in space. They have all of the gravity of the star concentrated into a miniscule point many times smaller than the original. Black holes are difficult to see because they…

… at all. The thought of them first started in 1783 when Rev. John Michell applied Newton’s theory of gravity to predict the possibility of so-called “dark stars.” Albert Einstein’s theory of relativity predicted in 1915 “Schwartzschild singularities.”…

… discoveries of this time. It has helped light up our fireworks on the Fourth of July, allowed us to use guns, and to make smoke. The history of black powder is considered to be founded in Italy around the time of the thirteen hundreds. It was…

… five species of the remaining rhinos. Rhinos have roamed the earth for over fify million years. Until the early part of this century, hundreds of thousands of rhinos roamed over huge area of Africa and Asia. The world's rhinos are endangered not…

… athlete’s ability to perform seems to increase by leaps and bounds. Some reasons for this can be attributed to better training methods, better conditioning techniques, and better over all health of the athlete. While most situations involve one or…

… which your heart pumps blood through the body. Occasional increases in blood pressure levels are not unusual. Hypertension Hypertension is high blood pressure. When heart beats (contracts and relaxes) it pumps out a certain volume of blood.…

… liquid is shaken for a few seconds until the liquid turns blue. Upon standing for about a minute, the solution goes clear again. This sequence can be repeated many times. How does it happen? Essentially, it is an oxidation-reduction reaction.…

… boiling water. If you cover the tin and allow the water and air to cool down, the air will cool and contract, lowering the pressure in the tin. If it lowers enough, the partial vacuum will collapse the walls of the can! The boiling point definitely…

… Infants (AAPI), over 400,000 babies are born prematurely or at a low birth weight. As a result of being born early they are more likely to require high-technology intensive and specialized care in the hospital and follow-up care as infants and children.…