Essays on Electrodes

Lab report: electrical conductance

Lab report: electrical conductance

Introduction

Electrical conductance is the property of an electrical conductor that determines how fast it contacts – how easily current flows through it (Shaw, 1911, p. 281). When a potential difference is applied across various types of conductors, current flows through the conductors at different rates. The rate at which the current flows through a particular conductor for a particular potential difference is dependent on the specific property of the conductor, referred to as electrical conductance. Conductance determines how well current flows through a particular conductor. Conductance is the inverse (reciprocal) of the property of the conductor ...

Aims and Objectives of the Experiment

This experiment aims at studying the characteristics of titrations with the strength of different acids used in these titrations. This is done by drawing the titration curves of the different titrations that are carried out in this experiment and interpreting those curves. The units of measurement for this experiment are the standard units that are used in titrations. These are molarity (moles/liter) of substances while the quantities are measured in mL (milliliter).

Theory and Principles

Conductometry is a type of electroanalytical method in analytical chemistry. While other electroanalytical methods use equilibria or electrodes, conductometry is different and employs the conductance of materials ...

Aims and Objectives of the Experiment

The main objective of this experiment is to determine the concentration of different substances. This is achieved by determining the end point(s) of different titrations using the automated potentiometric titrator. These points are known as equivalence points. The units of measurement are the standard units used in titrations i.e. Molarity (moles/liter) of substances used while the quantities of these substances are measured in mL (milliliter).

Theory and Principles

Potentiometric titration is a volumetric method which measures the potential between two electrodes, namely reference and indicator, with the change in the volume of the reagent that is added, known as the titrant. ...

Part 1

The equipment used to assess VO2 max and lactate threshold includes the h/p/cosmos Pulsar 5.0 treadmill, the Cosmed Quark PFT Ergo testing equipment, the Cosmed V2 mask, the HR Belt Cosmed-ANT (w/transmitter), and a computer.

Calibration Processes

The preliminary step for the experiment is to perform the calibration of the equipment. The treadmill velocity should be calibrated by marking a point and noting the time it takes to complete a predetermined number of revolutions. This time is used to calculate the velocity by using the length of the belt, which should also be measured. These calibrations should be performed at different ...

Report for Voltaic Cell Project (Lemon)

The purpose of the experiment is to demonstrate the production of electricity through the use of Zinc, Copper and Lemon. The experiment explores the electrochemical reactions that take place between the two metals in the presence of citric acid provided by the lemon to generate electricity. It highlights the oxidation and reduction reactions that occur within the lemon battery before electrons are released to generate electricity.

Background

The electrochemical reaction that occurs to generate electricity from chemical energy takes place between tow metal pieces, known as the electrodes, and a liquid known as the electrolyte. It is imperative that the ...

Fuel Cell Technologies in Passenger Cars

Fuel Cell Technology The last decade is characterized by the rapid development of research activity in the field of fuel cells, thus, creating the conditions for their uptake in electric systems. The basic fuel cells’ operating principle has been known for 150 years. However, a variety of technical and financial problems had kept them on the margins of technological applications (Brandon & Hart, 1999). The basic difference between a fuel cell and batteries is that while batteries store energy, fuel cells directly convert a fuel’s chemical energy into electricity by an electrochemical reaction (i.e. Without requiring combustion or movement ...

Human Physiology ECG Laboratory Report

Abstract This is a practical experiment on ECG concerning human physiology. The experiment intends to achieve one primary goal: equip the learner with vital skills pertinent in making rational decisions anchored on scientifically proven facts. I chose to study participants from both sexes with varying levels of nutritional statuses and physical activities. We recorded the foods consumed by each participant. The results indicated that those who took caffeinated drinks positively correlated to emission of rapid ECG signals demonistrated by the ECG readings.

Introduction

The heart is a fundamental organ in sustaining life. It contracts at regular and perpetual intervals throughout ...

Introduction

Taking measurements may require the conversion of the measured quantity to electrical quantity. Transducers are devices or elements that perform this function by transforming physical quantities such as quantities like sound, light, or temperature into electrical signals like current, voltage, or capacity. Transducers consist of inputs, sensing elements, transduction elements, signal processing, and electrical outputs. The inputs known as the measurands are the quantities, states, or properties that are to be translated into electrical outputs. The sensing elements accurately measure these input energies and sends the information to the transduction elements to be transformed into the desired form. The ...

Lignin Chemistry

Lignin History Lignin is a plant-derived biopolymer with several applications. It is considered an effective alternative to chemically synthesized plastics that pose serious environmental problems during manufacture and disposal. Lignin is often obtained as a byproduct in paper and pulp manufacture. Lignin has to be dissolved to obtain cellulose from wood. In 1838, Anselme Payen discovered that wood contained cellulose, and oxidizable coatings (later called lignin) that bind the cellulose together (McCarthy and Islam, 2000). This coating material could be removed from wood after acid treatment and washing with an aqueous alkali solution (McCarthy and Islam, 2000). Later, several ...

Introduction

In the year 2015, Wang, Doleschel, Wunderlich, and Heinen published a paper in the Journal of Medical Systems [1]. The paper was on a wearable wireless ECG system that was based on the novel 3-Lead electrode placements. After carrying out an experiment for the 3-Lead electrode placements, it was discovered that the distance between the electrodes could further be reduced for efficiency. A smaller sized sensor node being powered by a rechargeable battery would then be developed based on the newly identified electrode positions. A dynamic method of controlling power is also automatically installed in the sensor node for ...

Introduction

Performance enhancement in sports has been a controversial topic over the years. Specifically, sports organizations prefer the utilization of performance enhancement drugs to enhance their efficiency in the sporting activities while other humanitarian and government organizations raise concerns over the negative impacts of these drugs. As such, this paper discusses the negative impacts associated with performance enhancement drugs to the human body and the ethical concerns that emerge from this approach. In many instances, PEDs have been reported to enforce significant resiliency among the users and this is an advantage to sportsmen due to the enhancement of biological functions ...

Microbial fuel cells are devices that employ bacterial or other microbial cells to generate electricity (Singh, Pratap, Baranwal, Kumar and Chaudhary, 2010). Cells generally carry out electron transfer and oxidation-reduction reactions during normal metabolic activities. Electrons generated during these reactions can be made to flow through an external circuit to generate current. Fig 1. Depicts a typical MFC. The anodic compartment consists of microbial culture in glucose or other medium (Singh et al, 2010). Wastewater can also be used as a substrate source for microbes in a MFC intended for effluent treatment application. The microbial cells breakdown complex substrates ...

LIBs Summary and Prospects

Research in lithium ion batteries (LIBs) has focused on both active and non-active components. Flexible packaging of LIBs has been achieved by using aluminum pouch cells, polymer-coated aluminum pouch, and polymeric pouch cells. Polydimethylsiloxane material has also proved to be an excellent material suitable for packaging. Research in flexible materials has incorporated the element of cost. Laminate structures have been found to be less costly than the current technology in use. Separators for LIBs need to be not only thin, but also highly porous Cellulose nano-fiber paper-derived (CNP) and ceramic-based separators have shown impressive performance. Manufacturing of LIBs requires ...

Healthcare is a profession that requires intensive documentation, timely actions and response, as well as high level of human skills for delivery of quality healthcare. There has been an effort since extremely long time to bring in information technology and digitization into the realm of healthcare. The result has been in isolated pockets and digitization is being witnessed more in diagnostic efforts and aids. These isolated pockets have resulted in extremely sophisticated diagnostic equipment starting from digital X-Ray machines, blood analyzers, ECG (Electrocardiogram) machines etc.. The digitization efforts has so much so intensified in the area of healthcare that ...

Abstract

This is a practical experiment on ECG with regards to human physiology. The experiment was intended to achieve one primary goal: equip the learner with vital skills pertinent in making rational decisions anchored on scientifically proven facts. The alchemist recruited study participant from both sexes with varying levels of nutritional statuses and physical activities. The foods consumed by each participant were recorded. The results indicated that those who took caffeinated drinks positively correlated to emission of rapid ECG signals demonistrated by the ECG readings.

Introduction

The heart is a fundamental organ in sustaining life. It contracts at regular and perpetual ...

Introduction

This proposal is about the physics of microwave oven. This includes the interaction of microwaves with metals and the generation of microwaves in magnetrons. The reason for choosing a microwave oven is because they are used common places like in homes and restaurants for warming food. A microwave is a wave that belongs the class of electromagnetic waves. They have frequencies ranging from 300 MHz to 300GHz and wavelengths ranging from 1 m to 1mm. (Bradshaw, Van & Swardt, 201)

Physics of the Microwave

A typical microwave oven consists of the magnetron, fan, power supply, waveguide, turntable and a base plate. The microwaves are ...

Biology

Abstract This is a practical report on human physiology EMG. The experiment recruited 85 subjects to examine the level of the signal emanating from muscle contraction in the lab. Some of the participants were left-handed while some were right handed. Males and females with varying levels of activity were recruited. The results indicated that more males exhibited maximal compression force than females as attested by the higher numbers that returned quickly to half the clench force. The level of activity of the participants positively correlated to slow return to half of the maximal compression force and reduced signs of ...