Research question: How will increasing the voltage (v) to 5v, 10v, 20v, 35v, and then 50v affect the amount of current (Amps) measured by an ammeter, keeping the resistance (ohms) at 12 ohms and the wire length of 10cm constant, in a series circuit to prove ohms law? Background information on Ohm’s law: Ohms law…
INTRODUCTION AND BACKGROUND THEORY When electrons travel through wires or other external circuits, they travel in a zigzag pattern that results in a collision between the electrons and the ions in the conductor, and this is known as resistance. The resistance of a wire causes difficulty for the flow of the electrical current of a…
(a). Define Atomic radius? Ans. The distance from the centre of the atom to the outermost electrons is called the Atomic radius. (b) State and explain the trends in the atomic radius for the period and a group. Ans. As you move across a period the atomic radius decreases except for the noble gases, because…
OBJECTIVES To understand how a potential difference (voltage) can cause an electric current flow through a conductor. To understand the relationship between voltage, current, and resistance in a DC circuit. To explain the physics behind the different current readings across the circuit. THEORY Direct Current (DC) is the constant flow of electric charge from high…
Research Question: What is the effect of changing the angle (ranging from 0° to 90°)at which the “Speed of a Bubble” tube is tilted on the velocity of the bubble going up the tube? Background: For this experiment we used “Speed of a Bubble” tubes. These are long glass tubes filled with a fluid of…
Aim: To investigate how different concentrations of sodium chloride affect the rate of corrosion on iron nails. Theory: Corrosion is the degradation of a metal due to chemical reactions between it and its surrounding environment (Bell, 2015). It is most commonly associated with rust, in particular the rusting of metals such as iron. Iron corrosion…
TLC is thin layer chromatography, chromatography in which compounds are separated on a thin layer of adsorbent material, typically a coating of silica gel on a glass plate or plastic sheet. Lab coats and safety glasses must be worn as Ethanol which is flammable, Ethyl Ethanoate which is volatile, highly flammable and the vapor may…
ABSTRACT: This experiment was conducted to investigate the selective permeability of dialysis tubing. The permeability of the tubing to glucose, starch and iodine (potassium iodide) was tested. The dialysis tubing was clipped to form a bag so that glucose and starch was fed into the bag through the other end, and was also clipped to…
Purpose: Two observe two different single displacement reactions. Hypothesis: When zinc is added to copper (II) sulfate, a single displacement reaction will take place, creating a solid, copper, and zinc sulfate. When zinc is added to hydrochloric acid, hydrogen gas will be released a solid, zinc chloride, will be formed. Materials: Hydrochloric acid Zinc Copper…
Introduction The principal component of vinegar is acetic acid- HC2H3O2, and also a little bit of water. While analyzing vinegar and the percent composition of acetic acid in it, an acid/base reaction was performed by adding NaOH, a base, to vinegar, the acid. NaOH was added in small amounts at a time to a beaker…
Introduction: Kinetics in chemistry deals with the rate at which a chemical reaction occurs. This rate, which is referred to as the reaction rate, is defined as the change in concentration of a reactant or product with time and is measured in M/s. The rate of a reaction is proportional to the concentration of reactants.…
Introduction: The Ideal Gas Law can be used to find any missing variable when all of the others are present. The Ideal Gas Law is stated in the equation, PV=nRT, where P is the gas pressure in atmospheres, V is volume that the gas occupies in liters, n is the number of moles of…
Foreign Trade Zones were created in the United States to provide special customs procedures to U.S. plants engaged in international trade-related activities. Duty-free treatment is accorded to items that are processed in foreign trade zones and then re-exported, and duty payment is deferred on items until they are brought out of the foreign trade zone…
In 1512, the Dutch humanist Desiderius Erasmus (1466-1536) published De Copia (meaning “on command of language” or “richness of expression”). Erasmus’s book was one of the most influential rhetoric texts of the European Renaissance. One exercise in De Copia directs students to compose several hundred variations of one sentence. This exercise has three purposes: (1) …
Daniel J. Levinson wrote The Seasons of A Man’s Life. Mr. Levinson conducted his research for the book in the late 1960s. At that time he was a Professor of Psychology in the Department of Psychiatry of the Yale University School of Medicine, Director of Psychology in the Connecticut Mental Health Center, and Director of…
The main theme of Snowbound is that no-matter what happens, family will be there to help and comfort. This theme is demonstrated widely throughout the poem and even more so in the last stanza of this excerpt. Another, less prominent, theme of Snowbound is the meaning and involvement of God in the lives of people.…
Drake’s Equation is an equation used to estimate the number of detectable extraterrestrial civilizations in the Milky Way galaxy. Invented by Frank Drake, the founder of SETI. Ns 1011 Stars discovered so far Fp (0.5) Half the planets in the Milky Way galaxy have stars around them Ways to detect planets Transit Method: Diming of…
The Da Vinci Code, a novel that was subsequently turned into a film, brings to light a theory held by some conspiracists regarding the hidden truth of Jesus’ sexual involvement with Mary Magdalene. In the movie, Robert Langdon, a Harvard symbologist, while evading arrest, seeks to solve the murder of his acquaintance, coming across an…