3.1 & 3.2 Chemistry Notes Dalton * In 1805‚ John Dalton reintroduced the idea to explain 3 fundamental principles Experimental Work * Atoms of different elements have different properties * Law of definite proportion and multiple compositions: atoms of 2 or more elements can combine in a fixed ratio to form new substances depending on their combining capacities (eg. H2O vs H2O2) * Law of conservation of mass: atoms cannot be created or destroyed during a chemical reaction
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The History of Electricity Our knowledge of electricity has started from very humble beginnings when you look at where we are today. Electricity has been around for as long as humans have. When lightning strikes ancient people may not have understood what it was or why it happened‚ but they at the very least witnessed it happen. Nature acted as a sort of catalyst to spark the curiosity of early people. It was only until sometime between 624 BC and 546 BC where an understanding of electricity
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with the ocean surface. Wave energy is an irregular oscillating low-frequency energy source. They are a powerful source of energy‚ but are difficult to harness and convert into electricity in large quantities. The energy needs to be converted to a 60 Hertz frequency before it can be added to the electric utility grid. Wave energy generation is a developing technology. Although many wave energy devices have been invented only a small number have been tested and evaluated and very few of these have been
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Week 1 iLab Report DeVry University NETW360: Wireless Technologies and Services OPNET Preparation and Spread Spectrum Transmission Comparison Submitted to: Professor: Date: November 2‚ 2014 OPNET Preparation OPNET Preparation Paste your Windows Explorer screenshot that shows your Citrix NETW360 directory structure here. An example screenshot appears in your Week 1 iLab tab. Spread Spectrum Transmission Comparison Introduction to Spread Spectrum Transmission Guidelines What is it? Why is it
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is the cost of the electricity bill for that quarter? Answers 1) The following quantities are measured in the following units; - Electric Current is measured in Ampere‚ A. - Inductance is measured in Henry‚ H. - Frequency is measured in Hertz‚ Hz. - Power is measured in Watts‚ W. - Energy (work) is measured in Joules‚ J. 2) AC 3) Power = Energy / Time‚ therefore Energy = Power x Time. i) 10 bulbs x 60 Watts = 600 Watts‚ 600 Watts x 6 Hours = 3600 Wh = 3.6 kWh per day.
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The difference between speed and velocity is that Velocity also includes a direction the acceleration of gravity on earth is approximately 10m/s2 if you drops rock from a tall building‚ about how fast will it be falling after 3 seconds? 30m/s Momentum is defined as Mass time’s velocity suppose you live on the moon. Which of the following would be true? Your weight would be less than your weight on Earth‚ but your mass would be the same as it is on Earth. In which of the following
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Blackmun Racism is man’s gravest threat to man - the maximum of hatred for a minimum of reason. Abraham J. Heschel At the heart of racism is the religious assertion that God made a creative mistake when He brought some people into being Friedrich Otto Hertz To live anywhere in the world today and be against equality because of race or color is like living in Alaska and being against snow. William Faulkner Racism has been an integral component of American culture since its founding upon the genocide
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Zipcar’s main competitor and rival was a Seattle-based company Flexcar. In the fall 2007 Zipcar purchased Flexcar. In April 2010‚ Zipcar also bought London-based car-sharing firm Streetcar in its latest bid to expand across Europe. Rental companies like Hertz‚ Enterprise Rent-A-Car and U-Haul are beginning to form competitive hourly rental programs‚ that car compete with Zipcar. I also found a competing company in NYC and Boston called Mint Car. Their web-site looks very similar to Zipcar and the service
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point to point voiceless communication but placed the framework for future thinkers to expand on it (Campbell 113). In the 1860’s James Clerk Maxwell theorized the existence of electromagnetic waves. His theories were proven by Heinrich Hertz in 1887. Hertz name became adapted to the measure of radio frequencies (Keith 2). All of these men’s inventions and theories led to the wireless technology of radio. Up until 1901 the ability communicate was only possible from land to land through wires
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BDP 301: Principles of Business Syllabus November 25‚ 2009 version The University of Texas at Austin School of Undergraduate Studies Professor Michael Brandl (See information below) Unique: 63610 Spring 2010 Lecture: 2:00-3:15pm TTh in GSB 2.126 Professor Contact Information Email: michael.brandl@mccombs.utexas.edu Office: CBA 2.212 Office Hours: Tu Th 12:30 to 2pm and by appointment Office Phone: 512-232-3355 Course Description The vast majority of non-business majors will‚ at some point
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