TOPIC 1: RATES AND CHEMICAL EQUILIBRIUM QUESTION 1: (Taken from the DoE Physical Sciences Feb-March Paper 2 2009) Antacids are used to relieve indigestion. Indigestion is the condition when the stomach produces too much acid resulting in an uncomfortable and painful feeling. A certain antacid tablet dissolves in water and reacts with the acid in the stomach to release carbon dioxide gas. 1.1 Name the type of chemical reaction that explains why antacids bring relief from indigestion
Premium Electrochemistry Chemical reaction Chemical equilibrium
Science Folio Chapter 5 B6D5E1 Title: Importance of maintaining the cleanliness of air Introduction The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth’s gravity. The atmosphere protects life on earth by absorbing ultraviolet solar radiation‚ warming the surface through heat retention (greenhouse effect)‚ and reducing temperature extremes between day and night. One of the most important factors drawing international attention which is
Premium Ozone depletion Ozone Air pollution
|How can we save energy? | |Saving energy means decreasing the amount of energy used while achieving a similar outcome of end use. Using | |less energy has lots of benefits – you can save money and help the environment. Generating energy requires | |precious natural resources‚ for instance coal‚ oil or gas. Therefore‚ using less energy helps us to preserve | |these resources and make them last longer
Premium Natural environment Packaging Automobile
discussion of the causes for the Age of Discovery‚ and the early colonization of the Americas‚ the Age of Discovery occurred in Europe‚ in the mid 15th to 16th centuries‚ and describes the time period in which Europe; predominantly Spain; set out to discover a new safe passage to the Indies‚ and Asia. The impetus for the discovery was the continued unrest in the Middle East after the Crusaders had returned to Europe. I will discuss how these events influenced the discovery of the Americas‚ and led to the
Premium Europe Age of Discovery Christopher Columbus
Shaan Sarode Ms. Davis English IV – Per. 3 20 October 2010 Impact of Medieval Medicine Imagine when a friend gets sick or catches a “bug”‚ they may have two different reactions to it. The first is the realistic approach‚ which re-visits their recent actions and pinpoints the cause of the symptoms. The other is the non-realistic‚ which tends to blame supernatural causes. People during the medieval times almost always blamed the supernatural as the cause of these diseases. There were also many
Premium Middle Ages
EXECUTIVE BRIEFING Energy sector is one of the most important sectors for the current economy. Nowadays‚ the access to energy is a key point for the development and welfare of a country. With that purpose‚ all the countries try to push forward their energy sectors‚ aiming to have enough resources to sustain their growing perspectives. Within the energy sectors‚ the electricity sector is considered a strategic one‚ considering the increase of electricity demand occurred during the last 15 years
Premium Electricity generation Electricity distribution Energy development
Antibiotics Antibiotics transformed medicine. The discovery of antibiotics began by accident. On the morning of September 3rd‚ 1928‚ Professor Alexander Fleming was having a clear up of his cluttered laboratory. Fleming was sorting through a number of glass plates which had previously been coated with staphyloccus bacteria as part of research Fleming was doing. One of the plates had mould on it. The mould was in the shape of a ring and the area around the ring seemed to be free of the bacteria staphyloccus
Premium Personal computer Computer
Herbal medicine is the extraction of herbs or plants which have a medicinal value in treating illnesses and diseases (Brody 1). A herb is known as a plant that does not have a woody stem and usually dies back at the end of each growing season. It is also known as a "natural" drug because they are derived from nature. This is unlike pharmaceutical drugs‚ which are synthesized from chemicals. Herbal medicine dates back a very long time. More than 4‚000 years ago‚ the Chinese emperor Qien Nong
Premium Herbalism Pharmacology Alternative medicine
How Technology Changed Medicine What do robotic arms‚ super computers‚ and scanners have to do with medicine? They are all used to enhance the quality of people’s lives! Through the use of technology‚ the medical field has changed incredibly. Treating diseases has become easier than before. In addition to that‚ diagnosing patients in a doctor’s office or in a hospital has also been refined. Moreover‚ even saving people’s lives during emergencies has been improved with the addition of medical technology
Premium Medicine Health care Health
Nuclear Medicine Nuclear medicine has been around for more than 50 years now and stems from the discovery of x-rays and artificial radioactivity. In 1946‚ nuclear medicine made a monumental breakthrough when radioactive iodine led to the complete disappearance of cancer in a patient’s thyroid. Nuclear medicine became widely used in the 1950’s to measure the function of the thyroid‚ to diagnose thyroid disease‚ and for the treatment of patients with hyperthyroidism. By the 1970’s nuclear medicine was
Premium Ionizing radiation Nuclear medicine Gamma ray