College of Technology Ohm’s law & resistors in parallel & in series Lab 4 Class: PHY 1434-E475 Due date: March, 13 20144 Group Names: Hisham Sageer Objectives: Our object is to confirm Ohm’s law by analyzing the dependence of the electrical current as a function of voltage and as a function of resistance. Also, we studied the current flow and voltage in series and parallel. Finally, the lab determined the equivalence resistance of series and parallel combination...
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the wire increases, the resistance of the wire will increase. Background: Some materials have consistent resistance at the same temperature regardless of how much voltage is applied through them, these materials are known as ‘Ohmic’ resistors. This is because they are said to obey Ohm’s law, which states that if a voltmetre is used to measure the voltage (V) of an unknown resistance (R), and an ammetre is used to measure the current (i) through the same unknown resistance, then ‘R’ would be given...
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TENS 2146 Electric Devices and Measurements Lab 3 Current and Voltage This report was prepared by: L. Wall Fall 2009 Prof. R. Alba-Flores Team Members: J. White, L. Wall Conducted on: September 17, 2009 Submitted on : September 24, 2009 Abstract: In this lab students experimented with light emitting diodes. The student built a basic circuit with two LED's and resistors in parallel. The results showed that the voltage is the same in parallel. The items that were in series had...
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Ohms Law Ohms Law Thomas More College Thomas More College How it applies to different materials Lucas Cosmidis 11 physics How it applies to different materials Lucas Cosmidis 11 physics Aim/Purpose The aim is to investigate whether 12v light bulb and a ceramic resistor are either non- ohmic or ohmic. From results calculations can be made to find the resistance produced and then graphed indicating whether the light bulb and ceramic resistor is ohmic or non ohmic Background...
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Ohm’s Law II Abstract: The purpose of this experiment is to demonstrate how non-ohmic devices respond on a direct circuit. Furthermore, we also explored their behavior when they were connected in different configurations. In order to accomplished this we used a capacitor, diode, resistor, and battery. We ran a series of experiments that generated graphs and equations, which can explain the relationship between voltage and time for capacitors and diodes. Non-ohmic resistors are also referred...
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Investigating Ohm’s Law Introduction/Background Current is the rate of the flow of energy; an electric current is the flow of electrical charge around the circuit. It is measured in ohms (Ω). The quantity of flow in an electric circuit is dependent on the ohmic value of the resistance. The amount of resistance in a given circuit is stationary and is not dependent on the current. “The higher the voltage of a battery, the more potential energy per coulomb of charge it can supply.” (1) It is...
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of charge carriers that pass a fixed point per unit of time) through a conducting or semiconducting medium for a given resistance to the flow. Voltage is symbolized by an uppercase italic letter V or E. The standard unit is the volt, symbolized by a non-italic uppercase letter V. One volt will drive one coulomb (6.24 x 1018) charge carriers, such as electrons, through a resistance of oneohm in one second. Voltage can be direct or alternating. A direct voltage maintains the same polarity at all times...
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Study about Ohm's Law: • To verify Ohm’s Law by calculating voltage, current and resistance based on different views of Ohm’s law as well as measuring those values to compare the theoretical results with the actual results. • To verify the relationships of R-I, V-I and R-V given ohm’s law by increasing one parameter while holding the other parameter constant, then measuring and calculating equivalent results of the third parameter. What is Ohm's Law: Ohm's Law is made from 3 mathematical equations...
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An Investigation of Ohm’s Law Stephen McGill (22044566) Results from test using 25Ω Resistor: Voltage(Volts) | Current(mA) | Resistance(Ohms) | 0 | 0 | 0 | 0.57 | 20 | 28.5 | 1.01 | 40 | 25.25 | 1.49 | 60 | 24.83 | 2.01 | 80 | 25.12 | 2.51 | 100 | 25.1 | 3.0 | 120 | 25.0 | 3.51 | 140 | 25.0 | 4.0 | 160 | 25.0 | 4.5 | 180 | 25.0 | 5.03 | 210 | 23.95 | 5.52 | 230 | 24.0 | 6.02 | 250 | 24.08 | 6.51 | 270 | 24.1 | 7.0 | 290 | 24.13 | 7.5 |...
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Induction and Faraday’s Thursday, October 25, 2012 Lab Report 6 Introduction and Faraday’s Law Objective: In this experiment, Faraday’s law of induction will be investigated. Theory: Faraday’s law of induction states the induced emf or voltage in a coil is proportional to the rate of change of magnetic flux through a coil, this is shown blew: Ƹ= -dɸ/dt Equation 6.1 The flux of the magnetic field is defined and the following: ɸ=BAcosΘ Equation 6.2 ...
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LAB REPORT ON VERIFICATION OF HESS’S LAW Our purpose of doing this lab was to prove the Hess’s law correct. Hess’s law suggests that the enthalpy change of a reaction must be equal to the sum of the enthalpy changes of the related reactions which lead to the original reactions. The following are the reactions at the lab; 1) NaOH ( s) NaOH (aq) 2) NaOH (aq) + HCl (aq) NaCl (aq) + H2O (l) 3) NaOH (s) + HCl (aq) NaCl (aq) + H2O (l) As explained before, Hess’s Law states that the enthalpy...
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Lab Report Purpose: 1. To test Mariotte's Law 2. To test Charles' law 3. To test Gay-Lussac's law 4. To test ideal gas law Theory: Mariotte’s law Charles’ law Gay-Lussac's law Ideal gas law Apparatus: beaker, boiling water, thermometer, pressure-meter, oil, closed tube. Procedure: 1) Set up all the apparatus 2) Open the rubber cap. Move the closed tube several times to ensure that the oil is spread...
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Senan Farrelly Alec Haas Introduction Ohm’s Law is V = I * R or in some cases I = V / R. The next two laws were established by a German physicist by the name of Gustav Kirchhoff. Kirchhoff’s first law is his voltage law. Kirchhoff’s Voltage Law (KVL) states that around any loop in a circuit, the voltage rises must equal the voltage drops. The next law that Kirchhoff introduced was his current law. Kirchhoff’s Current Law (KCL) states that the total current entering a junction must equal the...
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PHY 114 Faraday’s Law of Induction Stephanie Scott Section: 10849 Group #3 Bochao Li 3/31/15 Abstract: The objective of the Faraday’s Law of Induction lab was to verify Faraday’s law of induction by measuring the emf generated in a small coil and comparing it with the calculated value. Secondly the goal was to investigate the relationship between the emf and the frequency of the driving signal. The magnetic field was found to be uniform throughout. For the frequency of 40 Hz, the...
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Experiment number : 1! ! ! ! ! Title : Resistance Color Code ! ! ! Performed by : El Batina Bokhoum Engineering course : ENG-102 Partners : Betsy Batista Lab Day/Hour : Tuesday 6-8 pm! Jermaine Lockley ! Lab Instructor : Dr. Gontar ! Date Performed : 09/09/14! Date Due: 09/16/14! ! Purpose : The purpose of this lab is to be able to measure the resistance of color code ! .The experiment will help us to interpret and record the ohmic value of a resistor when given a color-...
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Ohms law V=i×R Hypothesis Volts equal amps multiplied by resistance. if voltages are kept constant and current is decreased and temperature is kept at a mere 15C and the circuits resistance will increase. In the same way if resistance is increased current strength would decrease accordingly. Can I prove that in circuit volts equal amps multiplied by resistance? Aim To determine the volts in a circuit I will attempt an experiment, to design a circuit where volts are kept constant and resistance...
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CONFIRMING OHM’S LAW BY ALEX KUCHMENKO 9.1 Aim – To Confirm Ohm’s Law through experimentation. Hypothesis – The More Ohms the resistor has, the weaker the current will become. Materials – Power pack, ammeter, voltmeter, resistors, connecting wires. METHOD – 1. POWER PACK POWER PACK RESISTOR RESISTOR VOLTMETER VOLTMETER AMMETER AMMETER A A V V Set up a known resistor...
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Lab 3. Dc circuits and Ohm’s law of measurments Helina Wolfe Tannaz Farnoudi and Najah Rouse Physics 246-205 Professor Joe Renaud 09/23/13 Word count:1453 Abstract: The aim of this experiment was to understand the relationship between the variables of Ohm’s law and how they are part of an operation of an electric circuit. Introduction: This experiment was done in two parts. The first part consisted of understanding how to determine the current, voltage and resistance...
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Post lab 4. If we increase the temperature of a conductor, its resistance will increase. In a semiconductor, resistance will decrease as temperature increases. Read more: http://wiki.answers.com/Q/What_is_the_effect_of_increasing_temperature_on_resistance#ixzz1u3megHV5 1. Resistors Resistors are the most commonly used component in electronics and their purpose is to create specified values of current and voltage in a circuit. A number of different resistors are shown in the photos. (The...
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& Ohm’s Law Abstract: In this lab, students were introduced to the field of electrical engineering. The objectives of the lab were to determine the resistance of a resistor using various methods and to also verify Ohm’s Law. In the lab, the students were instructed to calculate the resistance by using color codes, measuring the resistance using a Digital Multi Meter, calculate the average resistance from 10 voltage and current measurements, and find the graphical resistance using a trend...
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Lee 1 Kwan Woo Lee Lab Report#1 Measurements in resistive networks and circuit laws laboratory Abstract: The purpose of this lab is to verify the Ohm's Law, Kirchhoff's Voltage and Current Laws. As well as the introduction to the voltage division. The Ohm's Law states that the current through a conductor between two points is directly proportional to the potential difference across the two points (V = IR). The Kirchhoff's Voltage Law states that the directed sum of the electrical voltage...
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Kirchoff A little history about Ohm Kirchoff's current and voltage laws Ohm's law Circuit analysis example Bibliography A little bit about the life and times of Gustav Robert Kirchoff: Gustav Robert Kirchoff was a German physicist born on March 12, 1824, in Konigsber, Prussia. Gustav Kirchoff's first research topic was on the conduction of electricity. As a result of this research, Kirchoff wrote the Laws of Closed Electric Circuits in 1845. These laws were eventually named after their...
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has much more resistance. Energy has to be spent to force electrons through it. And heat comes off as a result. All conductors have some resistance but:  Long wires have more resistance than the short wires.  Thin wires have more resistance than thick wires.  Nichrome wire has more resistance than copper wire of the same size. Resistance is calculated using this equation: VOLTAGE RESISTANCE = CURRENT The unit of resistance is the ohm Here is...
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Lab: Gas Laws Purpose: Obtain a reference of temperatures effect on gas using Charles’ law when heating a capillary tube in water on a heated hot plate. Then, cooling the same capillary tube with ice while measuring the temperatures cooling effect on the gas bubble inside the capillary tube. Measurements of temperature change are taken with microLAB sensor and graphed using microLAB software. A final determination of experiments determined absolute zero versus actual absolute zero will be...
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OHM’S LAW INTRODUCTION Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them provided the temperature remains constant. The mathematical equation that describes this relationship is: where V is the potential difference measured across the resistance in units of volts; I is the current through the resistance in units of amperes and...
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Coulomb's Law 1. Objective - To study the validity of Coulomb’s law on a simple electroscope. This will be split into two parts; first measuring the the force as a function of distance, and second we will look at how the magnitude and sign of the charges affect the force. 2. Theory- As is well known, like charges repel and opposite charges attract. That being said, the strength of those forces also depends on the...
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ELECTRICITY HOTS Questions for Practice 1. Name a substance whose resistance almost remains unchanged by increase of temperature. 2. Name two special characteristics of heater coil. 3. A wire of resistance 4 ohms is bent to form a circle. What is the resistance between two diametrically opposite ends? 4. How does the resistance of a conductor change if its temperature is increased? 5. A current of 4A flows in a wire of resistance 60 ohms. Calculate electrical energy consumed in 2 minutes. 6. V-I graph...
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Aim: To determine a value for the spring’s force constant, k. Introduction: Hooke’s Law indicates the relationship between the amount of extension, e, of a spring to the size of the force, F, acing on it. This relationship may be written as :- F = ke F = ke where k is a constant for which particular spring you are using. It is the force constant of the spring. * The force applying on the spring, F, is denoted by Newton in SI Units. (N) * The amount of extension of the spring...
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Law of Conservation of Mass / Introduction to Weighing Using the Analytical Balances Brandon Palmisano Lab Partners: Matt Hattenburg & Peyton Dannewitz Chemistry A Dr.Clark Date: March 18, 2015 Introduction: The Law of Conservation of Mass states the matter can neither be created nor destroyed. Antoine Lavoisier is credited with the discovery of the Law of Conservation. Lavoisier carried out his ideas as early as 1774. The Law of Conservation has been proven by a variety of experiments...
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JOULE’S LAW Introduction and research question In this experiment, we were going to investigate the resistance R of an immersion heater. We had to make our own heater, and measure the resistance using a multimeter. Then we had to measure the current I, using an ammeter and a voltmeter. And at last, we had to determine the power P of the immersion heater. This experiment would require to make a table with the data collection, a graph, and a few calculations using Joule’s and Ohms law. Our research...
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Determination of a Rate Law Megan Gilleland 10.11.2012 Dr. Charles J. Horn Abstract: This two part experiment is designed to determine the rate law of the following reaction, 2I-(aq) + H2O2(aq) + 2H+I2(aq) + 2H2O(L), and to then determine if a change in temperature has an effect on that rate of this reaction. It was found that the reaction rate=k[I-]^1[H2O2+]^1, and the experimental activation energy is 60.62 KJ/mol. Introduction The rate of a chemical reaction often...
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Name: _____________________________________ Block: _________ Date: _______________ Lab #14: Boyle’s Law Objective: To determine the relationship between the pressure and volume of a gas at constant temperature. Introduction: The relationship of pressure to volume for a gas in a rigid container was first described in 1662 by the Irishborn scientist Sir Robert Boyle (16271691), and is known as Boyle's Law. As long as the temperature of the gas remains constant, the pressure...
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I. Introduction: The purpose of this lab report is to differentiate between of Newton’s Third Law and Newton’s Second Law. Newton’s Third Law states that all forces come in pairs and that the two forces in a pair act on different objects and are equal in strength and opposite in direction. Newton’s Second Law states that the acceleration of an object is proportional to the net force and inversely proportional to the mass of the object being accelerated. Using calculation equations for acceleration...
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Chemistry Beer’s Law & Colorimetry Submitted by Monika Rebalska Date Submitted: 3/7/2015 Date Performed: 3/5/2015 Lab Section: Chem-180 Course Instructor: Cynthia Spencer Purpose The purpose of this experiment was to construct a Beer’s Law Plot, determine the concentration of a sample using the Beer’s law plot, and...
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Physics Practical Report: Experiment: Ohmic Resistance and Ohm’s Law Patrick Doan Mr Sadowsky 11 PHYS 71 12/9/08 Table of contents 1.0 Aim 1 2.0 Hypothesis 1 3.0 Materials 1 4.0 Method 2 5.0 Results 3 - 5.1 Qualitative Observations 3 - 5.2 Data 3-4 6.0 Discussion 5 7.0 Conclusion 6 8.0 Bibliography 7 9.0 Acknowledgements 7 1.0 Aim: To find out how current,...
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Writing Laboratory Reports Lab reports for Biology may seem different than other classes you have taken. As you progress further in science, you will see variations in styles of lab reports, though they all contain the same basic principles. Lab report sections are as follows: Cover Page Introduction Objective Materials and Procedures Results/Data Conclusions Works Cited **Not every lab report will contain every section. I will give you specific instructions for each lab write-up** ...
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Voltage Divider Lab Report Table Of Contents 1.0 Introduction The following report consists of test results gathered from the design and construction of a voltage divider. The divider was built with the purpose of reducing the power from 12V to 0V using different combinations of given resistors in a complete circuit. Having a basic understanding of electrical circuits is an essential need even for non-electrical engineers. Mechanical, computer and other engineering disciplines will...
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Nguyen Wed 2:00-5:00 02/19/2014 OHM’S LAW I. Purpose The purpose of this lab is to help understand how voltage, current and resistance are closely related to one another. The outcome from this lab is to be able to differentiate when to use ohmmeter and voltmeter for the individual circuit. II. Theory Ohm’s Law states that the electric current through a material is directly proportional to the voltage across a piece of material (such as wire) while the resistance is held constant. mathematical equation...
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Objective: My objective in this experiment is to investigate one of the factors that affect the resistance of a piece of wire; the one I am investing is the length at constant temperature. My objective in this experiment is to investigate one of the factors that affect the resistance of a piece of wire. The factor I chose was length. Factors: There our four different things that affect the resistance of a wire: 1. The Length because the wire is thinner than the rest of the wires the electrons...
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EM-1 Title: Ohm’s Law, Meters, Resistivity I Purpose: The basic of simple electrical circuits and measurements is learned. Also, investigating the dependence of the resistance of a wire on its length, cross-sectional area, and the material of which it is made. By examining electrical resistance (R) through a metal conductor, the voltage (V) and current (I) through the conductor, the following principles will be demonstrated: 1.) Ohm’s Law 2.) Dependence of resistance (R) on the length (L)...
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2006 "Ohm's Law is the relationship among electric current, resistance, and voltage. The principle is named after the German scientist George Simon Ohm." Webster's Online Dictionary. I will be discussing the uses of Ohm's Law and why it is so important in everyday electrical problems whether it be simple or not. It is everywhere and used by many whether they notice it or not. Ohms law states that current in amperes is equal to voltage divided by resistance. This form of ohms law is most useful...
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Marcus Tung Friday, October 5, 2012 Lab Report: Newton’s Second Law Trial: 1 |Mass of cart with sensors (kg) |0.877 kg | |Regression line for force vs. acceleration data | |Y= 0.8325x + 0.05480 | | ...
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Physics Lab report Aammar Paracha Section MX Feb 6th 2015 OPTICS Abstract: This experiment revolves around using light rays and lenses. The experiment also discusses different properties of light rays. This experiment uses different lenses and measurements to produce images and observes different techniques to obtain the image position. Question and Answers: 1. Use your data to verify the Law of Reflection and then use Snell's Law to calculate...
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SCIENCE AND ENGINEERING 1. Course Number and Title: CHEM-181 General Chemistry I 2. Semester Hours: 4 Contact Hours: (3 + 2) Lecture Lab 3. Catalog Description This course, intended for science majors, is the first course of a two-course sequence. Course topics include stoichiometry, inorganic nomenclature, solutions, gas laws, thermochemistry, atomic structure, and chemical bonding. The laboratory work includes basic laboratory techniques and is intended to support lecture...
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Lab Report: Scientific Method Your Name: Taylah Harness Purpose of this Lab What is the goal of this lab? What question is it trying to answer, or what problem is it trying to explain? The goal for this lab is to be able to get the boiling water's temperature to increase by adding table salt. The problem it is trying to explain is, how does table salt affect the boiling temperature of water? does it increase or decrease? or does it stay the same? Hypothesis After reading the...
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| Measurement of Electrical Resistance and Ohm’s Law | Physics Lab 204.001 | | | | Yewande Adeniyi | 9/22/2011 | | PROCEDURE 1. Connect the ammeter A, the voltmeter V, and the power supply PS to the Resistance Box. The basic circuit supply is series with a resistor. To measure the current in the resistor, the ammeter is placed in series. To measure the voltage across the resistor, the voltmeter is placed in parallel. 2. Vary the current through resistor R1 in steps...
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Yeast Lab Report Guidelines 1. Lab reports are to be computer-generated and double-spaced. All sections of the report must be written in paragraph form. 2. Do not use encyclopedias (Internet or otherwise), dictionaries ((Internet or otherwise), or personal web pages as sources for the report, this includes Wikipedia. You may use a textbook, lab manual, and/or article(s) in a published journal. You can find journal articles by going to the library website: http://www.lib.clemson.edu/ and selecting...
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Fire Bug. Objective : To demonstrate the differences between physical and chemical changes while observing the laws of conservation of matter and energy. Procedure : Watch each part of the experimental demonstration and make predictions about what will happen in each scenario. 1. View the three scenarios listed below. You must observe and analyze these as part of the lab. The Iced Tea Debate The Salty Soup The Fire Bug 2 Use the DATA chart provided for recording observation...
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Ideal Gas Law Lab 1. Procedure: First, we used a balance to weigh the canister of gas, and recorded that mass as the original weight. Then, we filled a large bucket with water and recorded the temperature. We then filled a small test tube with water at the same temperature and poured that water into a graduated cylinder to measure the original volume of water in the tube. We then poured the water back into the test tube and placed the tube into the bucket with the opening upwards, turning the...
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Physics Lab Report#3 “Determining the period of a pendulum” Name: Fei Huo Date performed: October 1st, 2014 Period 5 Teacher: Mr. Glasel Purpose: The Purpose of this Lab was so that my classmates and I can examine what kind of factors affect the period of a pendulum. Introduction: In a simple form, the pendulum is a weight hung from a long string that Galileo discovered that it can be used to track the passage of time very accurately around 400 years ago....
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10/24/2013 LAB TITLE: Single Replacement Reaction of Solid Copper with Silver Nitrate PURPOSE The purpose of this lab is to: • Observe a single replacement reaction, and • Calculate the mole ratio of silver (Ag) to copper (Cu) in the reaction MATERIALS • Copper wire (30 cm) • Large test tube • 250 ml beaker • Silver nitrate (AgNO3) powder • Dilute AgNO3 solution • Distilled water • Electronic balance • Glass stir rod • Watch glass PRE-LAB DISCUSSION A single...
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Chem 105 Guide to the Formal Laboratory Report The purpose of a formal report is to communicate effectively to another person the goal, procedure, data analysis method, and results of your laboratory work. The report is divided into several well-defined sections. Each section must be present in a complete report. To earn an outcome point for the laboratory report, a student must submit a formal lab report that earns a score of at least 90/100. Each error (factual, grammatical, typographical...
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Experiment 12: Calorimetry and Hess’s Law Purpose: The purpose of this lab is to determine the enthalpy of reaction for the burning of one mole of magnesium in oxygen. Although the reaction is exothermic, the ∆HRXN will be determined by using calorimetry and then using Hess’s Law to manipulate the data collected to yield the answer needed. Procedures: Dillon, Stephanie. “ Calorimetry and Hess’s Law.” Laboratory Manual. Pearson Publishing, 2012, pp.168-177. Data and Results Part A ...
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Down the Hill Lab Report Kinetic & Potential Energy Name: Corinne Chen Block: 1 – 3 Date: May 22nd, 2013 Purpose: To investigate and compare the potential energy, kinetic energy and speed of a cart on a hill 1 kg h 1 m Materials: 1. 2. Cart & 1 kg mass 3. Board 4. Timer ...
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Erin Arroyo Lab report June 11, 2013 Biology 123 Professor K Title: Scientific Investigation of the Peroxidase Enzyme & Temperature Abstract: In this lab we tested the effect temperature has on the rate of enzyme activity. The way we figured this out was by taking four different temperatures and testing the different absorbance levels they produced every 20 seconds for two minutes straight using a spectrophotometer. The important part of this experiment was the temperature...
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Institute Physics Course 2014 - Rocket Lab Report Title: RockSim and Electronic Altimeter Measurement Techniques Name: Scarlet Henriquez Email: scarletpatricia94@aol.com LAB SESSION ___8____Assignment _____7_____ Due Date: ___7/8/14______ Objective: Launch a smaller rocket to learn how to compare RockSim predictions (computer based) to an actual instrument measurement carried by the rocket (Electronic Altimeter). This Lab shows how better the electronic measurement...
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Keith Beachy College Physics 1 Lab - Section 001 CP1 Lab Report - Projectile Motion October 12, 2009 The purpose of Lab Assignment 1 was to analyze projectile motion. In doing so, we determined the initial velocity of the ball shot horizontally from the spring loaded projectile launcher. Also, we verified the angle at which the projection of the ball would produce a maximum range. Lastly, we predicted the range that a ball would travel at a certain angle, theta. Projectile motion...
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Impulse and Momentum Lab Formal Lab Write Up Content Guide ( /3) Abstract : The abstract should explicitly state what law you are trying to show. State the three quantities that you are calculating and what you are hoping to show (what does the law say?). Give a brief explanation of the results. ( /15) Background : The topics included in the background should contain, but are not limited to: what is the definition of momentum and how is it calculated what are the differences and similarities between momentum and energy...
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How to write a lab report Let’s take as an example a free-fall experiment. You drop a small steel ball from various heights and use an electronic timer to measure how long it takes the ball to hit the ground. From this you calculate the final speed of the ball using v = 2x/t. You believe that the ball will have a constant acceleration of “g,” 9.8 m/s2. This will be seen if you graph velocity vs. time and get a straight line with a slope of 9.8. You end up with a table of data giving distances...
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Engineering Laboratory (Lab) Report Department of Engineering Faculty of Engineering and Science, University Tunku Abdul Rahman (UTAR) 1. Introduction Laboratory (Lab) reports are the most frequent document written by engineering student. These reports can contribute a significant amount of marks and yet little time or attention is devoted in understanding on how to write them well. The aim of this document is to provide a general guideline on writing a lab report. A lab report should not be...
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