Rates

Abstract: Our experiment tests how body positions and body movements affect heart rate. We used 4 different subjects and 3 different trials including our control. For our hypothesis, we theorized that the more movements that a person does, the higher their heart rate will be. After doing this experiment, we found that the more movements and exercises your body does, the more increased your heart rate will become. There could be possible sources of error like any experiments, so this data is the…

Heart Rates in Organisms. Jesutofunmi Bankole El Centro College Abstract This experiment studies the effect of caffeine and alcohol on heart rate. This lab experiment detailed how water flea, (Daphnia magna) a transparent aquatic organism whose heart can be easily identified using a compound light microscope, was used to study the effects of caffeine and alcohol on heart rates. According to the research alcohol was observed to have caused a decrease in the heart rate of…

The rate of nickel sorption by immobilized spent yeast in chitosan beads was determined as a function of the adsorbent dosage, initial pH and initial nickel concentration as shown in Fig. 1, 2 and 3, respectively. The sorption rate was rapid at the beginning of the period. It was observed that the equilibrium uptake of nickel by immobilized spent yeast was occurred after 2 hours. Kinetic studies of adsorption To investigate the sorption mechanism, the constants of sorption were determined by…

A fixed rate is a rate the government or in most cases the central bank sets and maintains as the official exchange rate. A set price will be determined against a major world currency. The most common currency countries usually fix to is the U.S. dollar. The local exchange rate is maintain by the central bank buys and sells its own currency on the foreign exchange market in return for the currency to which it is pegged. According to Xu unlike the fixed rate, a floating exchange rate is…

Explain what is meant by an equilibrium exchange rate. The equilibrium exchange rate is commonly defined as the currency rate of exchange where both the currencies being supplied is equal to the demand for it (Economics Online, 2014). According to Glossary of Statistical term (2002), the equilibrium exchange rate that is equal to currency’s purchasing power parity. It is determined differently using different monetary standards. The equilibrium exchange rate can be stable in addition to being…

Year 10 Biology IA Research Question How does consistent running up and down on the stairs at differing intensities affect the heart rate in Year 10 students? Introduction The main role of the circulatory system is the delivery of oxygen and nutrients and the removal of carbon dioxide and wastes. The circulatory system consists of the heart and the network of arteries, veins and capillaries. Carbon dioxide present in the body is carried by blood to the lungs for exhalation and oxygen is then…

that affects the speed of the chemical reaction will in turn affect the amount of current flow, which will affect the rate of corrosion. The rate of corrosion is directly proportional to the amount of current in the electrochemical corrosion cell. If the current can be measured accurately, then an exact calculation of the metal loss can be made. 2.2.1 ELECTRICAL EFFECTS ON THE RATE OF CORROSION Any issue that have an effect on the quantity of current flowing in a circuit can affect the speed…

Introduction The purpose of this experiment was to test whether or not the heart rate of a daphnia was effected by three different solutions being added: alcohol, lactic acid and, caffeine. We determined that when alcohol was added the heart rate would decrease. When lactic acid was added the heart rate would decrease, as well. When caffeine was added the heart rate would increase. We determined that alcohol would slow the heart rate because it is a depressant. Since humans that drink alcohol…

The rate at which a reaction occurs, referred to as reaction rate, is a type of reaction property that directly measures the extent of a reaction. Changes in concentration affect reaction rates in chemical formulas, and if the reaction is not specifically known, the rate cannot be determined. The rates are given in negative or positive measurements depending on whether the concentration is a reactant or product. Knowing this, the first step in finding the reaction rate would be to determine the…

Heart Rate This lab experiment was conducted on Daphnias to test the chemical effects on its heart rate. In this experiment we determined the effects of caffeine and alcohol on the small organism. If the Daphnia is submerged in alcohol the heart rate will slow down, as if it’s submerged in caffeine it will speed up. The experiment measured how the stimulant caffeine or alcohol affected the Daphnia. The objective was to see how alcohol and caffeine would affect the Daphnia's heart rate.…