circuit: Light Dependent Resistors Light Dependent Resistors (LDR) are also called photoresistors. They are made of high resistance semiconductor material. When light hits the device‚ the photons give electrons energy. This makes them jump into the conductive band and thereby conduct electricity. A photoresistor or light-dependent resistor (LDR) or photocell is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity; in other words
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Lab#: 15 Title: Exercise/pulse rate Aim: To investigate the effect of exercise on the pulse rate Materials/ Apparatus: Stop watch Diagram: Procedure: 1. The three middle fingers were placed just behind the bottom of the wrist as indicated in the diagram in order to see if the pulse could be felt. 2. (a) If the pulse was not felt the three fingers were moved about until it could be felt. (b) Changing the hand also helped to find the pulse. 3. The number of pulsation
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Experiment to Investigate Osmosis in Potatoes The aim of this experiment is to investigate the movement of water in and out of plant cells. The cells chosen for study will be taken from potato tubers. Firstly I will explain what osmosis is. Osmosis is the passage of water from a region of high water concentration through a semi permeable membrane to a region of low water concentration. This definition contains three important statements: a) It is the passage of water through a semi permeable membrane
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Light in August‚ by William Faulkner‚ is a story of racial conflict in a Southern United States town. Faulkner’s work is very unique because its structure presents only gradual revelations of information and consists of three different but interconnected plot threads. In this way‚ the narrative plots are circular because they build frameworks around the other plots. One of these three narratives focuses on the enigmatic character Joe Christmas. One of the most interesting things about Joe Christmas
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Applying “Visions of Light: The Art of Cinematography” After watching the film‚ “Visions of Light: The Art of Cinematography‚” I was introduced to the beauty of capturing perfected lighting‚ highlighting‚ and shadowing. Before watching this documentary‚ I never truly focused on how a scene was portrayed and why it made me feel how I did. After careful consideration‚ I have decided to apply my new knowledge to why I feel‚ “A Little Princess” has been perfected by cinematographer‚ Emmanuel Lubezki
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Summary This experiment will measure the rate of oxidation of iodide ions by persulphate ions to derive the rate law for the reaction. Starch will be added to the reaction to facilitate the measure of time during the reaction. The reactant solutions will contain (NH4)2SO4 and KI‚ represented as: (NH4)2S2O8 + 2KI -> I2 + (NH4)2SO4 + K2SO4 This can be simplified to: S2O82- + 2I- -> I2 + 2SO42- These equations can only be carried out and be visible after the iodine has completely
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INTO THE LIGHT STACY JUST DIED. IN A HORRIBLE CAR ACCIDENT. STACY’S WHOLE FACE WAS MUTILATED‚ THE BODY WAS TORN IN TO PIECES OF FLESH. STACY ENTERED THE AFTER LIFE. STACY COULD SEE NOTHING IT WAS COMPLETELY DARK. ANXIOUS TO FINALLY SEE WHAT ALL THE HYPE WAS ABOUT‚ STACY ENTERED A SUDDEN STATE OF HYPER SENSES. A HUGE VOICE ENTERED THE VOID AND COMMANDED STACY‚ “YOU!!! COME NOW‚ JUDGMENT IS UPON YOU.” THE DARKNESS DISAPPEARED. STACY WAS CONFRONTED WITH A HUGE LINE OF PEOPLE WAITING IN FEAR. UP AHEAD
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Association‚ proposes through her work‚ “Language and War‚” that it is the violent language and war glorifying metaphors used in daily life that has made people accustomed and accepting of violence in speech and reality. Martha Kinkade‚ author of Winter’s Light‚ recalls violent experiences from her past in Wyoming highlighting Hardman’s ideas that today’s speech is constructed to unintentionally promote the acceptance of violence. Through Kinkade’s poems “Boots‚ Sugar”‚ “Skinning”‚ and “Snowy Milkweed” Hardman’s
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Cellular Respiration Photosynthesis Organelles Mitochondria Chloroplast Organelle Structures The double-membraned mitochondrion can be loosely described as a large wrinkled bag packed inside of a smaller‚ unwrinkled bag. The two membranes create distinct compartments within the organelle‚ and are themselves very different in structure and in function. Two membranes contain and protect the inner parts of the chloroplast. The stroma is an area inside of the chloroplast where reactions occur and starches
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The Effect of Sugar Type on Rate of Energy Production During Yeast Fermentation Sarah Sulon Biology Lab 111L Dr. Murray October 25 2010 Abstract The experiment was conducted to determine the impact different sugar types have on yeast fermentation. It was hypothesized that glucose‚ sucrose and fructose would all produce energy through yeast fermentation‚ but that sucrose would have the greatest rate of energy production. The carbon dioxide production was tracked in the fermentation of yeast
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