gas welding‚ and resistance welding. 1) Arc welding: Heat is generated by an electric arc and the parts are simply fused together and became one. In some cases electrode is used that provides a filler material. 2) Gas welding: The burning gas (oxygen and acetylene) raises the temperature of the part to be joined and a welding rod provides filler material. 3) Resistance welding: The parts that are to be welded‚ while being forced together by mechanical pressure‚ are raised to the temperature
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Interpretation of the Arterial Blood Gas Self-Learning Packet 2004 This self-learning packet is approved for 2 contact hours for the following professionals: 1. Registered Nurse 2. Licensed Practical Nurse Orlando Regional Healthcare‚ Education & Development Copyright 2004 Arterial Blood Gas Interpretation Table of Contents Purpose ................................................................................................................... 3 Objectives ...........
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of only one kind of atom. A compound is the substance that is made from the atoms of two or more elements that are chemically bonded. Water is an example of a compound because it is one of many compounds that consist of molecules. The hydrogen and oxygen molecules are chemically bonded to form a water molecule. Properties and Changes in Matter Every substance‚ whether an element or compound‚ has characteristic properties. Chemists use these properties to distinguish different substances and then
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gas exchange in this zone? no 5. The respiratory zone contains alveoli where gas is exchanged. This zone consists of the respiratory bronchioles‚ alveolar ducts‚ and alveolar sacs. 6. The pulmonary arteries carries blood that is (high or low) in oxygen to the lungs. Pulmonary capillaries exchange gases with the alveoli. Blood leaves the lungs in the pulmonary veins‚ which carry oxygenated blood back to the heart. 7. Name the three types of cells in the alveolus: 1. Type I cells; simple
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Observations: Part I: Reaction between iron and oxygen Appearance of steel wool after 20 minutes From (relatively) shiny metal strips to notsoshiny strips that are stained with dark‚ reddishbrown stuff. Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination: Lots of white‚ foamy bubbles around the potato slices. Day 2 Observations: Part III: Reaction between zinc and acetic acid Appearance of penny in vinegar after 30 minutes: Pretty dark coloured
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discovered in dark ocean depths which rely on the energy provided by chemical substances spewed out by small volcanic vents. This is an example of a unique biological process of unusual energy conversion called chemosynthesis. But unlike carbon dioxide‚ oxygen‚ or water‚ energy does not cycle in biological systems. It is gradually lost as heat as the chemical bonds of the plant biomass are broken and reformed in animal biomass.
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oceans + used to form marine organism shells which were compacted to form sedimentary rock - plants evolved to photosynthesise‚ takingin co2 + releasing oxygen - scientists don’t kno where all nitrogen came from bc they weren’t there to record evidence but most theories suggest it ws due 2 volcanoes atmosphere today - nitrogen 78% - oxygen 21% - co2 0.04% - argon 0.9% - other gases v small amounts gas levels - co2 rises due to burning fossil fuels + deforestation - co rises due to incomplete
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in water by diffusion. What is the importance of this process in nature ? Carbon-di-oxide and Oxygen are the two atmospheric gases‚ that can diffuse in water. Oxygen is helpful for the animals inside the water and CO2 is helpful for plants in the water The oxygen from lungs diffuses into the blood stream‚ and reaches our cells. Fishes are able breathe under water due to diffusion of dissolved oxygen in water‚ in their lungs. Q-18 Why do gases have neither fixed shape nor fixed volume ? for
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we need for our growth and survival. Trees play a critical role in purifying the air that we breathe. Human beings and the other animals breathe in oxygen and emit carbon dioxide. In order to ensure that there is enough oxygen in the atmosphere‚ trees take up the emitted carbon dioxide and purify it oxygen. This cycle ensures that there is enough oxygen in the atmosphere at all the times. However‚ what people may not know is that we have to maintain the environment that we live in order to make sure
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How has a process in nature been used as a medical intervention? The process in nature is the chemical in fireflies that causes them to light up. It’s being used as a medical intervention by using them to directly measure energy levels inside our living hearts. What does the level of ATP tell scientists about the functioning of the heart? What the level of ATP says about the function of the heart is that high levels of ATP indicate a high level of O2 constant function and need for O2. What are
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