movement? 9. A man keeps 12 steps in north direction and turns right to keep 5 steps. He then returns to the initial point by the shortest path. Find a) Distance travelled. b) Displacement. Given step is 0.4m. 10.A circular cycle track has a circumference of 308m (ABCDA) with AC as one of its diameter. A cyclist travels from A to D along the circular path. Find the distance moved by the cyclist and the displacement if AB is along west-east direction.
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and access to a healthy culture of Daphnia. Students can readily follow this procedure working in pairs. Because of the variability of results between individual Daphnia it is not appropriate to make conclusions from one set of results‚ so each pair (or group) of students should carry out more than one investigation to contribute to the class set. One option is to record a live video of a sample Daphnia‚ during a time period in which students count the heart beats. Then‚ you can replay the video
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THE EFFECT OF CAFFEINE ON HUMAN BODY A Term Paper Presented to: Miss. Durano‚ Leony Marie WESTERN MINDANAO STATE UNIVERSITY MALANGAS CAMPUS MALANGAS ZAMBOANGA SIBUGAY In partial Fulfillment of the Requirements for the course English 102 (Writing in Discipline) Second Semester 2011-2012 Presented by: Mr. Reymonel R. Paler CS – 1 March 2012 Table of Contents I – Introduction ---------------------------------------------------- 1 A. Background
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Does caffeine affect the heart rate of Daphnia? Introduction In this experiment I aim to find out if caffeine has an affect on heart rate. Instead of using human subject‚ whom may already have a high tolerance to caffeine or could have ingested caffeine that day making the tests unfair‚ I will use Daphnia‚ a crustacean. They have on contact with caffeine making it fair. It will be easier to observe as it has a translucent body‚ making it able to see the heart beating under a microscope. It will
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experiment we tested the effects of different adrenalin concentrations (0.001%; 0.01%; 0.1%) on the daphnia flea. The daphnia was placed on a slide with cover slip in order to examine its heartbeat by using the microscope. Aim In this Lab we will study the effect of different concentrations of adrenalin on the heart rate daphnia‚ the water flea. It is expected to recognize a threshold of the daphnia in its reaction the three different adrenalin concentrations‚ in terms of heart rate. Background The
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2010 The Effects of Caffeine on the Human Body I. In a quote by Eddie Vedder‚ I read "Caffeine‚ the Gateway drug." Around 90 percent of Americans consume caffeine every single day in one form or another. Consuming as little as 100 mg of caffeine a day can lead a person to become "dependent" on caffeine‚ yet it is legal and unregulated in many jurisdictions. Making it the most popular drug by far. In this speech I am going to explain how caffeine affects the Human body. II. Caffeine is believed
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Daphnia Experiment Report 1. Introduction Caffeine is found in many plant species‚ where it acts as a natural pesticide. It is found most commonly in cocoa‚ tea and coffee‚ but is also artificially added to some soft drinks such as cola to act as a flavour enhancer. When consumed by humans‚ caffeine works as a stimulant causing amounts of released neurotransmitters to be increased. High use of caffeine has been related with raised blood pressure‚ restlessness‚ insomnia and anxiety which‚ in
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Effects of Alcohol‚ Caffeine‚ and Temperature on the Heart Rate of Daphnia magna Joseph Ezra Gallo BY124L MW 8:30-11:30 Introduction Ectothermic animals are animals whose body temperature is affected by their surroundings. This means that if the environment is cold the animal will be cold. If the environment is warm the animal will be warm. This is because the animal doesn’t have the capability of regulating its body systems to keep a constant body temperature. When an ectothermic animal is
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consume caffeine every day of the year. Caffeine is the ingredient that makes the public crave coffee‚ soda‚ chocolate and many other caffeine-carrying products. Americans consume about 45 million pounds of caffeine each year. In the United States‚ coffee drinkers drink an average of 2.6 cups per day. Total caffeine intake for coffee drinkers was 363.5 mg per day - this includes caffeine from coffee and other sources like soft drinks‚ food and drugs. Non-coffee drinkers get plenty of caffeine as well:
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hemp. The hypotheses stated that both drug were depressant drugs thus meaning that heart rate‚ and along with it‚ metabolism. The hypotheses are‚ in fact‚ true statements that can be backed with the data collected. The initial heart rate before the drug‚ hemp was applied‚ was 216 BPM. The final heart rate‚ with the drug was 132 BPM. That is a change by -84 BPM. This proves that hemp lowered the heart rate of the Daphnia‚ like the hypothesis stated. The overall average for all the groups‚ there is a
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