What are the four types of heart rates

What type of video game affects heart rate?

http://wiki.answers.com/Q/What_type_of_video_game_affects_heart_rate

I did a science fair project on this once. They all affect the heart rate somehow, some speed it up and others slow it down. I think FPS brought it up and racing brought it down. Most other genres, such as sports, had minimal effects. Don’t…

Can different types of music affect heart rate?

http://wiki.answers.com/Q/What_types_of_music_can_cause_the_rate_of_yur_heartbeat_to_go_faster_or_slower

Many factors including (but not limited to) mood can affect heart rate, music can definitely affect your mood, therefore, its reasonable to say that music could alter your heart rate. music does affect you in many ways, such as your mood, h…

How does the type of music affect your heart rate?

http://answers.yahoo.com/question/index?qid=20090104003311AAJY4he

average resting Heart Rate (HR) is usually 65-85, depending on their age. I know that when i listen to some hardcore music that my HR and my Blood Pressure (BP) increases, but only monetarily. Relaxing music can calm the mind, which in turn…

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Is this a heart attack? Chest muscle soreness?

Q: Well since about Tues I’ve had what seems to be light soreness not the intense kind you get after not working out in a long time. My upper body just feels stiff or heavy when you flex it from the muscles around both shoulder blades and the pectorals. Also I felt a stiff heavy sensation around my sternum and near my collar bone last night. But more so when I inhale. My upper left near the sholder and arm pit just feels a little tight. But the thing is that it’s not unbearable. I’m not crying in pain, have dizziness, or lightheaded, or nausea, or shortness of breath, no jaw ache, no finger tingling, no pain in arms, no sweating. I feel alright other then that I can walk and have good sprits, I’m not all down. I just got out of church and the driving on bumpy roads bothered me a little but sitting in the church and back home I feel ok. For information I’m 20 and overweight. But not extremely obese I played football all four yrs in HS and so I do still have some muscle. If you want to get an idea of my size just look at the actor comedian Kevin James. But also here is some medical history. My dad had diabetes who just passed away on 12/17 at the age of 58. Almost a year ago they hospitalized him and found he had a bad heart. He had lots of blockages but the deal with him was he never wanted to go to the doctor I don’t think he ever got his heart checked. He smoked also. I don’t smoke and don’t drink. They put him an ICD. They also told him he had several silent heart attacks. They had to place him on dialysis. Even though he was in decent shape he was 6′ and always weighed around 190. My mom’s family heart history is good. My dads only sister had a heart cath done in Nov. and she has been overweight since her teen yrs, but her results were good not one blockage. Last night I was doing home work for about 3 hrs strait in the same sitting location and this bother me a lttle. I stopped and I felt OK. I checked my resting heart rate with my watch and it was 85,82 lasts night now 78. I have no insurance and for the past few days I’ve put any medical attention off due to that fact. But now I realize after seen my dad I can’t take a risk. But I’m thinking or I’m going call the Drs. office on Monday since is now a weekend. Or shoud rush in to an ER? Sorry I’ve typed so much iand my grammer is bad, im just being paranoid I guess.Thanks!

A: You probably are fine and should call your dr on monday if you wish. Cardiac pain usually doesnt increase when inhaling. It coul be pleurisy if you have had a lung infection recently or have been coughing a lot. It could also be a pulled muscle or gas pains.Your dad most likely had the silent heart attacks because of the diabetes. Diabetes that is not well controlled kills the nerve endings in feet and fingers, but also to the heart. Basically he did not feel the pain. Diabetes also probably caused the kidney failure that lead to the dialysis. and the smoking surely did not help him. I am sorry for the loss of your dad, I have been there when I lost my mom at 11. It is natural to think you have the same illnesses that caused a loved one to die at a young age. My brother was 36 and diagnosed with colon cancer. Even though I had no symptoms I went and had the test done at 29 and again at 34. Both negative. You are responsible for your own health at 20 and seems like you want to make changes to prevent this from happening to you.. Go see the dr and get checked out. It will be worth the money in peace of mind.

List four different forms of localised corrosion and give a brief description of each?

Q: a) DIsscuss what is likely to be the major type of corrosive attack for all the folowing situations and make at least one recommendation, for each example, for reducing the rate of corrosion, if appropriate.i) Welded stainless steel sheets for an accommodation unit on an offshore oil rig.ii) Inside of a washing machine drum.iii) A heart pace maker comprising stainless steel battery containing unit and platinum contact wires.

A: Corrosion is breaking down of essential properties in a material due to reactions with its surroundings. In the most common use of the word, this means a loss of an electron of metals reacting with water and oxygen. Weakening of iron due to oxidation of the iron atoms is a well-known example of electrochemical corrosion. This is commonly known as rust. This type of damage usually affects metallic materials, and typically produces oxide(s) and/or salt(s) of the original metal. Corrosion also includes the dissolution of ceramic materials and can refer to discoloration and weakening of polymers by the sun’s ultraviolet light.Most structural alloys corrode merely from exposure to moisture in the air, but the process can be strongly affected by exposure to certain substances (see below). Corrosion can be concentrated locally to form a pit or crack, or it can extend across a wide area to produce general deterioration. While some efforts to reduce corrosion merely redirect the damage into less visible, less predictable forms, controlled corrosion treatments such as passivation and chromate-conversion will increase a material’s corrosion resistance. Rust, the most familiar example of corrosion.Corrosion in nonmetalsMost ceramic materials are almost entirely immune to corrosion. The strong ionic and/or covalent bonds that hold them together leave very little free chemical energy in the structure; they can be thought of as already corroded. When corrosion does occur, it is almost always a simple dissolution of the material or chemical reaction, rather than an electrochemical process. A common example of corrosion protection in ceramics is the lime added to soda-lime glass to reduce its solubility in water; though it is not nearly as soluble as pure sodium silicate, normal glass does form sub-microscopic flaws when exposed to moisture. Due to its brittleness, such flaws cause a dramatic reduction in the strength of a glass object during its first few hours at room temperature.The degradation of polymeric materials is due to a wide array of complex and often poorly-understood physiochemical processes. These are strikingly different from the other processes discussed here, and so the term “corrosion” is only applied to them in a loose sense of the word. Because of their large molecular weight, very little entropy can be gained by mixing a given mass of polymer with another substance, making them generally quite difficult to dissolve. While dissolution is a problem in some polymer applications, it is relatively simple to design against. A more common and related problem is swelling, where small molecules infiltrate the structure, reducing strength and stiffness and causing a volume change. Conversely, many polymers (notably flexible vinyl) are intentionally swelled with plasticizers, which can be leached out of the structure, causing brittleness or other undesirable changes. The most common form of degradation, however, is a decrease in polymer chain length. Mechanisms which break polymer chains are familiar to biologists because of their effect on DNA: ionizing radiation (most commonly ultraviolet light), free radicals, and oxidizers such as oxygen, ozone, and chlorine. Additives can slow these process very effectively, and can be as simple as a UV-absorbing pigment (i.e., titanium dioxide or carbon black). Plastic shopping bags often do not include these additives so that they break down more easily as litter.The remainder of this article is about electrochemical corrosion.Electrochemical theoryMain article: ElectrochemistryOne way to understand the structure of metals on the basis of particles is to imagine an array of positively-charged ions sitting in a negatively-charged “gas” of free electrons. Coulombic attraction holds these oppositely-charged particles together, but the positively-charged ions are attracted to negatively charged particles outside the metal as well, such as the negative ions (anions) in an electrolyte. For a given ion at the surface of a metal, there is a certain amount of energy to be gained or lost by dissolving into the electrolyte or becoming a part of the metal, which reflects an atom-scale tug-of-war between the electron gas and dissolved anions. The quantity of energy then strongly depends on a host of variables, including the types of ions in a solution and their concentrations, and the number of electrons present at the metal’s surface. In turn, corrosion processes cause electrochemical changes, meaning that they strongly affect all of these variables. The overall interaction between electrons and ions tends to produce a state of local thermodynamic equilibrium that can often be described using basic chemistry and a knowledge of initial conditions.Galvanic seriesMain article: Galvanic seriesIn a given environment (one standard medium is aerated, room-temperature seawater), one metal will be either more noble or more active than the next, based on how strongly its ions are bound to the surface. Two metals in electrical contact share the same electron gas, so that the tug-of-war at each surface is translated into a competition for free electrons between the two materials. The noble metal will tend to take electrons from the active one, while the electrolyte hosts a flow of ions in the same direction. The resulting mass flow or electrical current can be measured to establish a hierarchy of materials in the medium of interest. This hierarchy is called a Galvanic series, and can be a very useful in predicting and understanding corrosion.Resistance to corrosionSome metals are more intrinsically resistant to corrosion than others, either due to the fundamental nature of the electrochemical processes involved or due to the details of how reaction products form. For some examples, see galvanic series. If a more susceptible material is used, many techniques can be applied during an item’s manufacture and use to protect its materials from damage.Intrinsic chemistry Gold nuggets do not corrode, even on a geological time scale.The materials most resistant to corrosion are those for which corrosion is thermodynamically unfavorable. Any corrosion products of gold or platinum tend to decompose spontaneously into pure metal, which is why these elements can be found in metallic form on Earth, and is a large part of their intrinsic value. More common “base” metals can only be protected by more temporary means.Some metals have naturally slow reaction kinetics, even though their corrosion is thermodynamically favorable. These include such metals as zinc, magnesium, and cadmium. While corrosion of these metals is continuous and ongoing, it happens at an acceptably slow rate. An extreme example is graphite, which releases large amounts of energy upon oxidation, but has such slow kinetics that it is effectively immune to electrochemical corrosion under normal conditions.PassivationMain article: PassivationGiven the right conditions, a thin film of corrosion products can form on a metal’s surface spontaneously, acting as a barrier to further oxidation. When this layer stops growing at less than a micrometre thick under the conditions that a material will be used in, the phenomenon is known as passivation (rust, for example, usually grows to be much thicker, and so is not considered passivation, because this mixed oxidized layer is not protective). While this effect is in some sense a property of the material, it serves as an indirect kinetic barrier: the reaction is often quite rapid unless and until an impermeable layer forms. Passivation in air and water at moderate pH is seen in such materials as aluminium, stainless steel, titanium, and silicon.These conditions required for passivation are specific to the material. The effect of pH is recorded using Pourbaix diagrams, but many other factors are influential. Some conditions that inhibit passivation include: high pH for aluminum, low pH or the presence of chloride ions for stainless steel, high temperature for titanium (in which case the oxide dissolves into the metal, rather than the electrolyte) and fluoride ions for silicon. On the other hand, sometimes unusual conditions can bring on passivation in materials that are normally unprotected, as the alkaline environment of concrete does for steel rebar. Exposure to a liquid metal such as mercury or hot solder can often circumvent passivation mechanisms.Surface treatments Galvanized surfaceApplied coatingsMain article: GalvanizationPlating, painting, and the application of enamel are the most common anti-corrosion treatments. They work by providing a barrier of corrosion-resistant material between the damaging environment and the (often cheaper, tougher, and/or easier-to-process) structural material. Aside from cosmetic and manufacturing issues, there are tradeoffs in mechanical flexibility versus resistance to abrasion and high temperature. Platings usually fail only in small sections, and if the plating is more noble than the substrate (for example, chromium on steel), a galvanic couple will cause any exposed area to corrode much more rapidly than an unplated surface would. For this reason, it is often wise to plate with a more active metal such as zinc or cadmium.Reactive coatingsIf the environment is controlled (especially in recirculating systems), corrosion inhibitors can often be added to it. These form an electrically insulating and/or chemically impermeable coating on exposed metal surfaces, to suppress electrochemical reactions. Such methods obviously make the system less sensitive to scratches or defects in the coating, since extra inhibitors can be made available wherever metal becomes exposed. Chemicals that inhibit corrosion include some of the salts in hard water (Roman water systems are famous for their mineral deposits), chromates, phosphates, and a wi

PLEASE HELP ME BEFORE ITS TOO LATE!read my story, touch my heart…?

Q: Is it classed as depression if you used to be pretty depressed, but now it comes on every seven days or so. it gets very severe that the depression hits and sometimes i have suicidal thoughts. i usually panic and take some panadol. ive never told anyone about my depression… ive had it for about three-four years. i also had bullimia for three years, not anymore but im scared it will come back again, ive been thinking about it lately, i had anorexia too, not that severe though.i know im depressed, and ive known for a few years, im only in year 12. i get really lonley and feel like no one loves me, and it only takes one tiny, meaningless comment to send me over the edge. im getting afraid because tonight i freaked out and i wanted to cut myself which i have Never doone or thought about befroe..im just a confused girl who cant find her place in the world, and is like so many of the other girls and boys who cant speak up about their issues due to fear and trust issues. i know i should probably get help, but i cant and i know that i wont. i keep telling myself i will when im onlder, but now im fearing that one day ill just crack and commit suicide. i guess i really just need to know whats wrong with me, so i will post some details, please tell me what type of depression i have, what i can do to fix it- antidepressants or something and what else is wrong with me. i know this isnt my fault and thats what makes me so confused- because i have nothing to blame…-i was overweight at a young age, lost it all five years ago and then became obsessed with weight four years ago and developed the metal side of anorexia. i thougtn i was fat but i was extremely thin. i got mad when people kept calling me thin. i also became depressed, i didnt know at first. its just everything built up, ive dealt with so much in my life, on top of that i was bullied and ive always felt unloved and unwanted. my depression has gotten worse over the years, sometimes it went away, sometimes it didnt, but it was always there. i wanted to kill myself so many times, and one time i couldnt takwe it anymore and i overdosed on panadol, its silly, but i did. thats when i freaked out and tried to throw them up… thats when i got bullimia, because id never purged before and it was so easy. i then went thrpough binge eating and puring on and off.anyway, my depression has gotten worse at times, to the point where id cry myself to sleep, write a suicide note or picture my death over and over..i stoped caring about life for so long.i put on an act every day, im known as the immature, enthusiastic funny girl, but inside im crying and dyeing and i dont know what to do,ive developed helath problems from the bullimia, a heart rate problem, which was undiagnosable and only i know what caused it…please tell me whats wrong with me, i know its getting worse, and when school is over and i dont have to go back anymore and be forced into putting on an act then i know i will end my life.the only thing holding me back is that im a coward. i dont want to be in pain anymore, and i dont want my bullimia to start again, but im alone and dont trust anyone. i like depressing music, if that makes a difference. i thought my depression was gone over the summer for about a month, but it came back and hit me so hard. please help me, before its too late…if you need anhymore details let me know,also, im at a healthy weight now, probably weighh too much…

A: i know this answer probably doesnt help, but when i read this i started crying. i have the same problem. i have a heart condition becase i starved myself for so long, and nobody knows why i got it but me. ive had depression for 5 years, and it comes and goes, depending on some things, and sometimes its completely random. i mean, you could start talking to a therapist, but i know i felt a tad uncomfortable when i had to. Art helps me alot, if your that type of person, and music is always good, sometimes it actually helps me, even if it is depressing. Sometimes i like to take the time to try and sit back and think about some things, write it down, and i like to spend time on myself, or things that make me more beautiful. i know im a complete stranger, but if you want, we could talk, no pressure though, i dont mind if you dont want too. All i hope for is that this might have helped a little bit.Take care, megg xxx [email protected]