Based on the class data‚ the density of the penny changed dramatically between 1980 and 1985. From 1975 to 1980‚ the penny became 1.40g/mL less dense and from 1980 to 1985‚ the density dropped by 0.626. With this data and the percent composition equation we were able to determine that the second metal in the penny is Zinc with a density of 7.14g/mL. Using scholarly online sources‚ I was able to confirm this data concerning the second metal to be correct. The United States Mint’s website states that
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Precision: Balance Lab Worksheet Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page. Procedure Access the virtual lab and complete the experiments. Data Below is the table that you will complete for the virtual lab. Either type your results into this table or print the table from the virtual lab (it must be submitted to receive full credit for this assignment.) To print from the virtual lab. Be sure the data
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Techniques and Measurements Course Number: CHE 111 Abstract: This experiment introduced the student to lab techniques and measurements. It started with measuring length. An example of this would be the length of a nickel‚ which is 2cm. The next part of the experiment was measuring temperature. I found that water boils around 95ºC at 6600ft. Ice also has a significant effect on the temperature of water from the tap. Ice dropped the temperature about 15ºC. Volumetric measurements were the basis
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1 Lab Assignment #5 Write-Up 2 General Info: Name: Date: Purpose: Of Exp #5: In this experiment we will learn about the spectroscope and how it works. To learn the concept of quantitative measurements‚ to construct a spectroscope and‚ to use it for taking quantitative measurements. Experimental Questions: Please complete this section of your write-up as you work on the experimental portion of this lab. 1. Hold the grating several inches from your face‚ at an angle. Look at
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How the Length of a Wire Affects Its Resistance In my physics coursework I am going to investigate the effect of the length of a wire on its resistance. Resistance is the measure of how easy it is for current to flow through a wire. Current is the rate of flow of charge through a conductor‚ and it is measured in amps using an ammeter. To help me plan my investigation I have completed a preliminary experiment in which I investigated the effect of the thickness of a wire on its resistance‚ using
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Measurement of National Income • Like the accounts of a business national income accounts have two sides: a product side and an income side. • On the product side production and sales are measured. • The income side measures the distribution of the proceeds from sales. • On the product side there are two widely reported measures of overall production: • Gross domestic product (GDP) and gross national product (GNP) • GDP and GNP differ in their treatment of international transactions. • GNP
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between the volume of a gas and the temperature of a gas at constant pressure. Verify Charles’s law. BACKGROUND INFORMATION The volume of a gas at constant pressure increases when the temperature of the gas is raised. This observation was first made by Jacques A. C. Charles in 1787. A quantitative study did not follow‚ however‚ until 1802‚ when Joseph L. Gay’ Lussac determined the relationship between the volume of a gas and its temperature. The relationship between the volume and the temperature
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World Customs Journal April 2009 Volume 3‚ Number 1 ISSN: 1834-6707 (Print) 1834-6715 (Online) World Customs Journal April 2009 Volume 3‚ Number 1 International Network of Customs Universities World Customs Journal Published by the University of Canberra‚ Australia and the University of Münster‚ Germany on behalf of the International Network of Customs Universities Management Group (INCU MG Inc.‚ Australian Capital Territory reg. no. A04701). The International Network of Customs
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in cold saline. -The above observed readings thus indicate that there has been a drastic decrease. Pertinent to this change is the fact that thermoregulatory centres triggerdilation of blood vessels. Once blood vessels are dilated there is a large volume of blood that passes in them thus allowing heat loss in terms of latent heat and perpetually decreasing blood pressure of cardiac output. (Allan‚2006) –Cold conditions of cold saline triggers narrowing of blood vessels. This as a result leads to
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affecting the time period of a pendulum. Research question: How does the length of a pendulum affect its time period? The independent variable is the length. The dependent variable is the time. Controlled variable is the mass of the pendulum bob. Formula for 1 period of oscillation of a pendulum of a certain length is T=2π √lg Where l is length and g is gravity (9.81 ms-2) T2= 4π2 lg T2= 4π2g l Hypothesis: The longer the length of the pendulum is‚ the longer the time that is
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