Systems of measurement

Aim The aim of this practical is to measure the effect of volume, density and temperature. It is also help to be familiar with variety of common laboratory technique. Materials Weighting scale Container with lids 20 and 10 ml Volumetric pipette Beaker Thermometer Test Tubes Volumetric flask Natural Rubber Pipette Filler Micropipette tips Tips boxes Method There are two pipette, choose one which you using in whole practical. Label and weight accurately, to 4 decimal places. Collect…

and blew through the end that was capped by the finger. The free floating bubbles were allowed to descend to the ground where their diameter was measured by a ruler. We found the averages by adding both the measurements of each solution in each test and dividing them by the number of measurements, two. For example: 1.25+1.30+1.20=3.75/3=1.25 average. There were multiple steps taken to prepare our data taken for analysis. Throughout our study, we took observations on the solutions and their…

meaning of, and relationship between, “reliability” and “validity” ? • Reliability is the extent to which a measuring tool gives consistent results. Reliable means to be consistently accurate, also describes as the absence of random error during measurement. There are three types of reliability: items of reliability, stability, and interobserver. • Validity is the extent to which a measuring tool measures what is supposed to measure. The process of validation includes verifying evidence…

Purpose The purpose of the lab is to design an experiment to verify the spring constant for an unknown spring, also known as k, how much a spring resists change (compression or expansion). We used a method changing a mass and measured the change in x. Theory Free Body Diagram a=0 Legend: ¬¬ a-acceleration Sp-Spring N-Normal S-Surface E-Earth C-Cart G-Gravity y- Y-Component x- X-Component Mathematical Model Basic Equations: Force Equation…

Prior to field measurements (during the identification field experience), practice cover estimates were recorded randomly on the site to ensure consistency. Percentage of canopy density was measured using a convex spherical forest densiometer, instrument design to estimate…

measured with the zero on the ruler, so that students are at least introduced to the correct way of approaching measurement. However, it is important to focus more on the underlying concept, and that will require students to actually be involved in creating a conceptual framework for measurement themselves (Swan, 2001). Averill and Harvey (2010) suggest introducing students to measurement through self-made scales rather than launching into using a ruler so that they can begin to grasp an…

During the course of this practical, the different factors of a pendulum will be investigated. A pendulum is a mass held from a fixed point so it is able to swing freely, the mass swings back and forth in an arc. The formula for finding the period of a certain pendulum lies in the change of the length of string suspending the mass, and the force due to gravity where the pendulum is being used. This relationship is shown in the equationT=2π√( L/g) (Sean, 2010), as the length of the string…

Office Spaces is updating their office chairs and have decided to alter the material and cross section of the arm supports. They have requested our assistance in evaluating several materials through experiments and simulations. The purpose of this experiment is to test these various materials and to recommend a material choice and cross section geometry that will minimize deflection of the arm supports. The following sections of this memorandum will detail several facets of the experiment.…

that the findings from these surveys are based on survey estimates, because of this, the results are subject to scrutiny and uncertainty. This means rather than having the exact measurement of well-being in the United Kingdom (UK), the results should be interpreted as providing a good estimate and not as an exact measurement. The advantage of measuring well-being inequality is that you can compare the differences of well-being compared to their income between higher and lower socio-economic…

(“Wikipedia”). Typically, if one were to place a weight towards the free end of a cantilever, some bending, or flexion, would be expected. Flexion, in this case, is the action of bending or the condition of being bent (“Merriam-Webster”). Given that angle measurements are involved, a protractor is typically used to measure flexion at the bending point of the cantilever. As stated before, the fact that flexion will occur as the cantilever length changes is already known. I want to see how much…