D. C. Polarography * Introduction: - Polarography is a particular case of general electro analytical technique known as voltametry. These methods are used to study the decomposition and quantitative analysis of solution. Principle: - It is a rapid and accurate technique in which electrolysis of experimental solution is carried out by using one electrode of comparatively large surface area (i.e. non-polarisable electrode) and the other electrode having a very small area (polarisable electrode)
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CE121: Construction Materials Laboratory Report No. 1 Particle Size Distribution Van Joseph E. Casalme 2010-14928‚ BS Civil Engineering Institute of Civil Engineering‚ College of Engineering University of the Philippines Diliman‚ Diliman Quezon City 1101 Submitted to: Engr. Christian R. Orozco ABSTRACT This test (ASTM C136-06) determines the grading of materials being used as aggregates using two parameters (coefficient of uniformity and gradation) from particle-size distribution
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Bubble Inside a Bubble Materials • • • • • • • • Granulated sugar (we had our best results using Imperial Sugar and Dixie Crystals) Dish soap Water Tablespoon Scissors Pipette Cup Adult supervision Bubbles form because of a combination of water’s hydrogen bonds and the oily film you can see shimmer in the light. The oily film you see is actually two separate layers of soap attached to‚ and surrounding‚ hydrogen-bonded water. Solar Oven S’mores Materials • Pizza box • Two clear sheet protectors
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Solute Concentration of Potatoes Lab #1 Purpose: To find the molarity/concentration of potato cytoplasm. Materials: As on page 1 in the lab handout. Procedure: As on page 1 in the lab handout. Data and Observations: Test Tube # | Concentration of sucrose solution (mol/L) | Initial Mass (g) | Final Mass | Percentage change in mass | 1 | 1.0 mol/L | 3.00g | 2.25g | -25.0% | 2 | 0.9 mol/L | 2.70g | 2.07g | -23.3% | 3 | 0.8 mol/L | 2.92g | 2.25g | -22.9% | 4 | 0.7 mol/L | 2.60g
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A 16.0 ohm and a 20.0 ohm resistor are connected in parallel. A difference in potential of 40.0 V is applied to the combination. p. Compute the equivalent resistance of the parallel circuit. 8.9 q. What is the total current in the circuit? 4.5V r. What is the current in the 16.0ohm resistor? 2.5 A 17. Describe how a permanent magnet differs from a temporary magnet. 18
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simple mechanisms used to convert rotary motion into oscillating linear motion and vice-versa. The first of these is the slider-crank - a mechanism widely used in engines to convert the linear thrust of the pistons into useful rotary motion. In this lab we will measure the acceleration of the piston of a lawn mower engine at various speeds. The results exemplify a simple relation between speed and acceleration for kinematically restricted motions‚ which will discover. An adjustable slider-crank apparatus
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Mitchell: talking@tpg.com.au For our other free eBooks: 50 - 555 Circuits 1 - 100 Transistor Circuits 101 - 200 Transistor Circuits 100 IC Circuits For a list of every electronic symbol‚ see: Circuit Symbols. For more articles and projects to suit the hobbyist: see TALKING ELECTRONICS WEBSITE INTRODUCTION This e-book covers a number of interesting circuits. They have been presented for a reason. The original circuits come from an Indian Electronics Magazine and most of them had faults
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Abstract This lab’s purpose was to test the patterns of percolation in various places. This lab tested how soil would absorb water based on different places. Distance from a group of trees‚ distance from a swamp‚ and different types of soil were tested. From the results collected‚ you can not prove‚ but you can infer that the ability to absorb increases as you go farther away from a swamp‚ and a group of trees. The ability to absorb also increases based on how much silt is in soil. Introduction
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Coulomb’s Law Purpose: The purpose of this lab was to demonstrate that the force between two stationary charges is directly proportional to the product of the charges and inversely to the square of the distance between them. Coulomb’s law tells us that the force between two charges depends (1) linearly on the strength of each charge‚ and (2) inversely on the square of the distance between them. Mathematically we would write this as . Procedures Part1 Begin by removing the right side
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simplicity of this circuit also adds a possibility of some simple audio modulation of the arc. So‚ let’s begin! The quasi-resonant topology But to say the least‚ the first driver I have built with this topology had an AC flyback and an input power supply rated just 60 watts. The result was a compact‚ short-circuit proof‚ high voltage “lab” supply with frequency control‚ some active cooling‚ audio modulation (singing arc‚ or a plasma speaker)‚ two 5-15 kV high voltage outputs (AC and DC) to play with
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