Duracell‚ Energizer‚ Eveready and Rayovac? Hypothesis We think that Duracell will last the longest because their advertising claims that no other battery "beats the copper top." Materials 1. Four of the same type‚ size and brand flashlights. 2. Two D-size batteries from each of the following brands: * Duracell * Energizer * Eveready * Rayovac 3. Two other D-size batteries to test each flashlight and bulb before starting tests. Procedure We tested each
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addressed in the modern day. Although many of us would agree not to commit crimes‚ Milgram’s experiment proves that humans are easily manipulated. At the beginning of the 1930’s‚ Adolf Hitler’s Nazi Party exploited the widespread discontent in Germany to attract popular and political support. Though the Germans were
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- Quasi Experimental Design: If the researcher lacks control over the assignment of participants to conditions and does not manipulate the causal variable of interest‚ the design is quasi experimental. o Quasi Experiments do not have internal validity because participants are not randomly assigned to conditions and the researcher may have no control over the independent variable. - Basic Confounds in Quasi Experimental Design are : o History o Maturation (Emotional‚ Physical & Psychological)
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Objective 1. To demonstrate the relationship between the pressure and temperature of saturated steam in equilibrium with water. 2. To determine the vapour pressure curve. Introduction Properties of a fluid can change when heat and work are applied to it. There’s an interchange between the fluid and its surroundings when heat and work are applied according to the study of thermodynamics. Substances such as gases and vapors are often referred as P-V-T substances. Theory: An ideal gas
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TITRATION Date : __________________________ Name : _____________________________________________________ Matric no. : __________________________ 1. Objective(s) of Experiment To measure the change in solubility product of potassium periodate (KIO4)‚ when an inert salt (NaNO3) is added to the solution. 2. Why important to determine solubility? The solubility product expression can be used for predicting whether or not precipitation will occur upon mixing two solutions and whether
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loss from the hot water from combining it with the cold water. As discussed in a page titled Heat Capacity2‚ the heat capacity is defined as the amount of heat it takes to raise the temperature of a substance by one degree (in this case C). In the experiment performed in lab‚ the heat capacity of the calorimeters was calculated by subtracting the heat gain from the heat loss and then dividing that by the difference in the temperatures between cold water and the combination of the hot and cold water
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The main focus of this experiment was to find the relationship between temperature and the enzyme activity of amylase. This was achieved by attaining amylase enzyme‚ starch solution and potassium iodide (determines if enzymes hydrolyses the starch solution)‚ water bath and a hot plate. The temperatures used for this experiment were room temperature‚ 37oC‚ 60oC‚ 80oC‚ and 90oC. The hypothesis developed was that as the temperature increased‚ so will enzyme activity. Therefore‚ the ability of the
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TOPIC: Spring Mass Oscillator OBJECTIVE: To determine the spring constant (K)‚ using mass system. APPARATUS: STEEL RULE SPRING STOP WATCH TAPE MEASURE SLOTTED MASS THEORY: In classical mechanics‚ a harmonic oscillator is a system which ‚ when displaced from its equilibrium position‚ experience a restoring force‚ F‚ proportional to the displacement‚ X‚ according to Hooke’s Law; F = – KX = mα …………………………………. Where‚
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Exploring Newtons 2nd Law of motion. Background Research How does changing the mass of an object effect how far it will travel ? This question can be answered by Newtons 2nd law of motion; Force equals mass multiplied acceleration (F= ma). This law states that a force on an object will cause it to accelerate in the direction of the force. The greater the force exerted on the object‚ the greater the acceleration. But how does mass effect this ? To find out‚ an experiment will be put into place
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bubbles. So that’s why we call it a lava lamp inside of bottle. The conclusion is that you can make lava lamp household items if you use Alka-Seltzer‚ water‚ food coloring‚ and vegetable oil. So if you want to try just do what we did. That is our experiment. Why this happened because the Alka-seltzer had a chemical reaction beacuse of some powder on the outside of the alka-seltzer so the bubbles carried the food coloring up to the top of the bottle
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