"Too much and too little of anything is bad. The why are students being given too much of homework these days? The trend shows that the amount of homework being given to the children has been continuously and significantly enhancing over the time since last few years. Yes‚ making the students learn well is important but that shouldn’t be combined with the pressure and burden on them. But also‚ it is something you cannot avoid and hence you need to learn how to manage the same. You need to develop
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Models of the Atom a) Plum Pudding Model The plum pudding model imagines the atom as a positively charged entity that contains randomly dispersed (negative) electrons within it. It is called the plum pudding model because the electrons in the positively charge cloud resemble raisins in a pudding. Thomson realized that all atoms must contain electrons‚ and since the atoms had a neutral charge‚ they must also include protons. This led him and other to think of the atom as a positively charged
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Unit 004: Understand how to apply scientific principles within mechanical services engineering Glossary of terms Term Explanation Alloy A metal made up of a combination of two or more materials. Atmospheric pressure The weight of air creates a pressure on the Earth’s surface and the pressure exerted by the weight of air pressing down on the ground below will vary depending on the ground’s height above sea level. Boiling When a liquid vaporises. Capillary action When water is drawn
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Act I Scene 1 Homework – Graphing a Wave Name: A vibration is a wiggle in time; a wave is a wiggle in space and time. In this exercise‚ you will explore that connection by transferring the motion of the second hand of a clock (a vibration‚ even if a slow one)‚ to a wave. Print out the image of a clock and open the spreadsheet called Grapher. You will find both of them in the same item where you found these instructions. Use a metric ruler to measure the displacement of the tip of the
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Abstract: Is it possible to create a science fiction-type force field? The article begins with a person asking the staff of The Straight Dope Science Advisory Board a question concerning the possibility of creating a fiction-type force field. The staff member asks the person to clarify the question by asking if it is a force field that protects a ship‚ a tractor beam or something to keep prisons in holding. She then explains the different kinds of forces considered by physicists and how some
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CIVL 4046 Fluid Mechanics Tutorial No. 1 2.15 A team is designing a helium-filled balloon that will fly to an altitude of 24‚000 m. As the balloon ascends‚ the upward force (buoyant force) will need to exceed the total weight. Thus‚ weight is critical. Estimate the weight (in newtons) of the helium inside the balloon. The balloon is inflated at a site where the atmospheric pressure is 0.89 bar and the temperature is 22°C. When inflated prior to launch‚ the balloon is spherical (radius 1.3 m) and
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SAMPLE PROBLEMS: 112- Topic 1: ELECTRIC FORCES & ELECTRIC FIELDS. 1) Charges of - 6 and + 4 nC are 3 m apart. Determine the force they exert on each other‚ and the electric field at a point midway between them. |Solution: This is an electrostatics problem (stationary charges). Since the charges|[pic] | |are of opposite sign‚ they will attract each other. The forces are indicated in the|
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Everything is relative or objective Nothing is really as it seems to us and all things are subjective to the observer. Everything is relative to each person from the viewpoint. Comparative readings‚ of two almost unimaginably accurate precision atomic clocks located on fast moving spacecraft and airplanes and on earth‚ have detected this strange skewing of time and proved Einstein’s theory of relativity to be fact. Stop all the clocks in the universe and movement will continue unaffected
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Name _____John Munro___________________________ Electric Fields – Lab 16 Go to http://phet.colorado.edu/simulations/sims.php?sim=Charges_and_Fields and click on Run Now. Part 1: What is an equipotential line and how is this simulation related to work and energy? 1) Turn on “Show Numbers” 2) Place a positive 1 nano-coulomb charge near the center of the screen. 3) In the lower left of the screen is a meter for indicating electric potential‚ in volts‚ created by the charge that you
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REFRIGERATION CYCLES Carnot Cycle We start discussing the well-known Carnot cycle in its refrigeration mode. Figure 1: Carnot Cycle In this cycle we define the coefficient of performance as follows: COP = qL TL = w TH − TL (1) Which comes from the fact that w = qH − qL (first law) and qL = TL Δs ‚ qH = TH Δs (second law). Note that w is also given by the area of the rectangle. Temperature differences make the COP vary. For example‚ the next figure shows how COP varies with
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