Class: Composition 1 Prof: Larsen 3/26/09 How does Sunblock works This essay is about how sunblokck works and the correct methods to use it. It also emphasizes the danger of the sun rays ( UVA/UVB). Many experts have different opinions on the subject but in reality is up to us as individuals to either use this product correctly or risk future injury on our skin. Sunblock works by blocking the sun’s UV radiation on the skin‚ both UVA and UVB.
Premium Ultraviolet Sunscreen
city-states. As we know‚ catapults were mainly used in the medieval era‚ or rather‚ it is most famous for use in that time‚ which you have probably seen in movies and books. How Does the Catapult Work? There is quite a bit of science behind the making of the catapult‚ and how it works. It is similar to a ballista that it works by storing tension in a flexed piece of wood or in twisted ropes. It’s similar to a bow‚ but on a much larger scale. However‚ that is just the catapult which is probably most
Premium Ancient Rome Roman Empire Ancient Greece
Introduction to How Gas Prices Work Image Gallery: Hybrid Cars Photo by Justin Sullivan/Getty Images High gas prices can make you stop and think about your commute. See hybrid car pictures to see models that save you money.In May 2008‚ average gas prices in the United States approached‚ and in some places passed‚ $4.00 a gallon‚ shattering records. But this was nothing new to American consumers. May was a month of records that broke one after another‚ and that came on the heels of months of
Premium Petroleum
1. Introduction 1.1. Literature Review 1.2. Objective 1.3. Research Problem 1.4. Research Methodology 2. Why do parents think spanking works? 2.1. Introduction 2.2. Why children should never be spanked? 2.3. Spanking and disciplining children 3. Corporal punishments in Schools and Institutions 4. Child spanking- jurisprudential analysis 4.1. Austin’s Analytical Positivism 4.2. Hart’s Analytical Positivism 5. Sociological school of jurisprudence 5.1. Rudolf Von Ihring 5.2. Roscoe Pound 6.
Premium Spanking Corporal punishment Corporal punishment in the home
two Title: Enzyme Function Purpose: To observe the role of enzymes in chemical reactions and to determine the kinds of cells that contain more of the enzyme catalase. Prior Knowledge: Enzymes are proteins that assist the chemical reactions of a cell by lowering the amount of activation energy needed to start the reactions‚ thereby enabling the cell to carry out the reactions at a faster rate; enzymes that lower the activation energy are therefore called catalysts. Moreover‚ the enzyme itself is
Free Chemical reaction Enzyme Catalysis
up compounds that need to be tested‚ taking those compounds with it. Through adsorption‚ the mobile phase separates into different components (soinc). The mobile phase can be liquid‚ gas‚ or supercritical fluid. How Does Chromatography Work? Chromatography is a surface effect. It works by first starting off with an unidentified liquid being injected into a column. As the chemicals in the liquid move down the column‚ they separate depending on their physical and chemical attributes‚ such as speed
Premium Chromatography Gas chromatography Analytical chemistry
How the Predator UAV Works Military commanders use tactics and strategy in combat to inflict as much damage on the enemy while trying to risk as few personnel and resources as possible. This principle was at the heart of the development of the RQ-1 and MQ-1Predator Unmanned Aerial Vehicle. These high-tech aircraft‚ controlled by a crew miles away from the dangers of combat‚ are capable of reconnaissance‚ combat and support roles in the hairiest of battles. In a worst-case scenario‚ if a Predator
Premium Unmanned aerial vehicle Aircraft Internal combustion engine
Abstract: This lab tests how temperature and pH affect how enzymes will function. The lab showed that temperature will denature an enzyme when past its optimal working temperature and won’t denature in cold temperatures‚ but have slowed molecular activity. pH will also have an affect on an enzymes efficiency‚ when out of optimal pH the enzyme will not function as it is supposed to and if to far out of the optimal pH the enzyme will change shape and no longer work. Enzymes also showed to be reusable
Premium Enzyme Chemical reaction Metabolism
Aim: This experiment will aim to show how the amount of substrate affects the rate of the reaction. Hypothesis: In this experiment I think the amount of substrate will simply increase the reaction. As I increase the surface area of the potato the gas given off from the reaction will increase. Therefore to sum things up‚ my hypothesis is when the Independent variable increases so will the dependant variable. Independent variable: - Surface area of potato Dependant variable: - Gas Controlled
Premium Potato Oxygen Measurement
How Nuclear Power Works The nuclear power plant stands on the border between humanity’s greatest hopes and its deepest fears for the future. On one hand‚ atomic energy offers a clean energy alternative that frees us from the shackles of fossil fuel dependence. On the other‚ it summons images of disaster: quake-ruptured Japanese power plants belching radioactive steam‚ the dead zone surrounding Chernobyl’s concrete sarcophagus. But what happens inside a nuclear power plant to bring such marvel
Premium Nuclear power Chernobyl disaster