PHYSICS PROJECT TO STUDY THE OPTICAL LENS OF A HUMAN EYE Eyes are organs that detect light‚ and convert it to electro-chemical impulses in neurons. The simplest photoreceptors in conscious vision connect light to movement. In higher organisms the eye is a complex optical system which collects light from the surrounding environment; regulates its intensity through a diaphragm; focuses it through an adjustable assembly of lenses to form an image; converts this image into a set of electrical signals;
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Introduction I have chosen to investigate a factor that affects the output of a potential divider circuit. A potential divider is resistors connected in series across a voltage source; used to obtain a desired fraction of the voltage. A resistor is a device having resistance to the passage of an electric current which affects the output voltage (Vout). The factors that I could investigate are changing the resistance of r2 and record the output (Vout)‚ or use a light-dependent resistor (LDR) and change
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Measuring Time Date Due: 2013.09.23____ Name: Lily Li____ Class: A__ Teacher: ___Mrs Slater___ Purpose: To determine the period and the frequency of a ticker timer. Materials/Apparatus: One ticker timer One carbon paper disc One 1.5+ meter tape One test tape One stop-watch Theory: The recording timer is a device that helps you study motion‚ it is a simple electric device plugged
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EDUCATIONAL PRINCIPLES 1 Educational Principles and Piaget’s Limitations of Preoperational Thought Cathleen Barney Excelsior College EDUCATIONAL PRINCIPLES 2 Jean Piaget’s theories continue to have a major impact on both teacher training and classroom practices. This essay will discuss the three educational principles derived from his theory and also discuss the limitations of preoperational thought from his point of view. The first educational principle is discovery
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was made into 3D movie this year------the 100 anniversary of Titanic being sunk. The movie Titanic is close to the real accident happened on April 14th‚ 1912 and there’s a lot of physics involved in the movie. We have to admit that James Cameron really spent plenty of time on the causation of the accident. ① physics side note: Pressure (√) At the beginning of the movie‚ there is a group of people who want to find the invaluable “Heart of the Ocean”. They used submarine to get 3821 meters under
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if this period with a fixed support would be about one meter. Make a pendulum with a yielding support. ix) Use the results from the experiment to calculate a value for d that would give a period of two seconds for the pendulum used. x) Use your answer to (ix) to suggest whether the use of a yielding support would save space. Theory
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JAR 66 CATEGORY B1 engineering uk MODULE 2 PHYSICS 1 MATTER ....................................................................................... 1-1 1.1 NATURE OF MATTER.............................................................. 1-1 1.1.1 Si units ................................................................... 1-1 1.1.2 Base Units.............................................................. 1-1 1.1.3 Derived Units ........................................................
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http://www.physicsclassroom.com/mmedia/circmot/rcd.cfm What is ‘g force’ in physics? G‚ in physics‚ a symbol relating to gravity. A capital G indicates the gravitational constant‚ as explained in the article GRAVITATION. A lower-case g stands for the acceleration imparted by gravity at the earth’s surface. An acceleration of 1 g is 32. 1 feet per second per second (9.8 m/s2). Fliers and astronauts may experience accelerations many times larger than 1 g. These accelerations are usually expressed
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ANSWERS TO QUESTIONS 1. Sustainable income is defined as the most likely level of income to be obtained in the future. It is the amount of regular income that a company can expect to earn from its normal operations. In order to distinguish a company’s net income from its sustainable income‚ irregular items‚ such as a once-in-a lifetime gain or discontinued operations‚ are reported separately on the income statement. 2. Items (a)‚ (d)‚ and (g) are extraordinary items; item (h) is debatable
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ULTRASOUND PHYSICS Name Institution a) Calculate the Acoustic impedance of subcutaneous tissue‚ muscle and bone. Assume subcutaneous tissue has a density of 1060kg/m3 (Hedrick 2003)‚ muscle has a density of 1104kg/m3 (Madjor 2008) and bone has a density of 5065kg/m3 (Hedrick 2003). Give your answer in Mrayls. Please use speed of sound as 1540m/s for tissue‚ muscle and bone In ultrasound‚ Acoustic impedance (Z) is the quantity of measurement of resistance to sound when passing through a medium
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