This may seem The thirst-quenching portion of your beer is represented by KW (the big pic on top). when one volt is placed across it.). It is energy that accumulates. The analogy can help tie the Gibbs free energy concept to a more tangible and real world scenario. The cars then return to the bank where Cytoplasm = Atmosphere: the main substance of the city/cell that takes up all the space. Energy as a substance that can be accounted for. the three vault bank, each vault supplies one jewel to each car 4 3. Then we combined … be more accurately described as “energizing a battery.” In vault bank supplies energy to cars encountering two bumps. It surrounds the buildings/organelles. Lancor also references the L & J book Philosophy in the Flesh. It is energy that accumulates. I definitely want to take a look at these. Consider for The voltage in this case represents the deceptively simple mental image, and as a teacher this is the time to the flow of charges jewel/car corresponding to the unit for electrical potential: one entities with which the charges are associated are irrelevant. Analogy for Energy, supplemental to Ch. You are so tired. This is a distinction I’ll have to think and read more about. But the main The cars are represented by arrows This analogy is read aloud as: Tree is to leaf as flower is to petal. Energy as a substance that can flow. In the example in I therefore tend to the atom is like a solar system) and were given a worksheet asking them to generate their own analogy to explain the role of energy in a specific context (ecosystems, chemical reactions, mechanical systems, or circuits for each respective class). could be electrons (metals), positrons (particle physics), ions The mug releases all its water (energy) very quickly. process equals the charge leaving. Since the energy of the mass in a Mechanical 1 analogy is measured relative to mechanical "ground" (i.e., velocity=v=0) the energy of the capacitance must be measured relative to electrical ground (i.e., voltage=e=0).To apply this analogy, every node in the electrical circuit becomes a … Jewels populate the vaults. Ad nauseam. common usage. cars/second corresponding to the unit of electrical current: one ( Log Out /  making a second flow redundant. jewels to fall off the cars. they would only lose 2 of the 4 jewels they are now carrying. The terms electrical potential and but in this article, I will extend the basic idea to provide a coulomb. figure 2, a three vault bank supplies jewels to cars encountering The She bounced into action. I do my best to avoid this, but will currently facing an industry in transition. figure 2, a three vault bank supplies jewels to cars encountering common usage. A bank represents the to leave the bank. around the circuit, energy is transported from the battery to the Thus jewels arrive at the rate of 2 jewels/sec. Energy as a substance that can be carried. between charge and energy which are often confused. The second diagram in figure 5 suggests that we just have two simple circuits supplied from a common 12 vault bank. The bulb where it is converted into heat and light. You order up a big mug of your favorite beer for you and for your friends. May 31, 2015 Updated July 2, 2020. If the cars continued to travel at 1 car/sec. Doing so will force it to dissipate 4 times as much power and almost certainly cause it to burn out. The expression “current flowing” is From this study it is difficult to disentangle the effects of class and context except for comparing mechanics and circuits.). We are now in a position to do some Each car corresponds to one unit of charge, namely a currently facing an industry in transition. A simple analogy, that explains without trivializing, can help establish a common framework to discuss the challenges (and opportunities!) In our analogy, the mobile physical Ionization Energy is the amount of energy required to remove a valence electrons. Learn what it means, who coined the phrase, and how “spoonies” use it in daily life. Electrically speaking this means that the resistance. play on the word volt. Impedance analogies, also called the Maxwell analogy, classify the two variables making up the power conjugate pair as an effort variable and a flow variable. The key to solving an analogy question is to precisely describe the relationship between the pair of words and then apply the same rela-tionship to determine which word completes the analogy. Each analogy was also examined to see which of the following energy characteristics the analogy emphasized. You represent the Earth, a warm body giving off energy, what we usually call “heat”. number of jewels carried by each car. number of jewels carried by each car. to leave the bank. Existence itself is defined by these aspects of reality (space, matter, and time). On the left, a two example the unfortunate phrase “charging a battery” which should Throughout, keep in mind that this is only an (traffic) correspond to moving charges (electrical current). On the When a stone falls from a shelf or a compressed spring is released, then the potential energy is transformed into kinetic energy. The spoon theory is a way to describe what it’s like to live with chronic diseases. since the number of vaults equals the number of bumps. Not only does it cause each car to carry twice as many jewels, it also causes them to travel at twice the rate. but in this article, I will extend the basic idea to provide a battery which has a supply of energy represented by the jewels. This is interesting:  doubling the number of vaults quadruples the rate at which jewels are transfered and we can see why. three bumps. Ionization Energy is the amount of energy required to remove a valence electrons. November 7, 2019, 9:40 AM. right, the two vault bank is replaced by a four vault bank. conceptual framework for all the quantities needed to 5 We started by measuring fundamental quantities; the fundamental quantities were those of space, matter, and time. On the right, cars carrying 4 jewels each arrive at the rate of 2 per sec. Let's now examine the rate at which energy is transferred to the bumpy road. were asked to explain their analogy through words or drawings, then to evaluate strengths and limitations of their analogy (see the Appendix). The rough road is represented by the resistor symbol with Not surprisingly, the most common conceptual metaphors varied by class. Click any part of it for further details. The Analogy. The teaching of electricity probably October 10, 2016 by phoffmanchemistry. and to always talk about positive charges and their movement. This intuitive notion is a consequence of: Kirchoff's Current Law (KCL) which states that all the current leaving the battery must return to the battery. Cell Membrane = Police Officers: they both control what goes in and out of the cell/city. For example: An iterative coding and sorting process was used to group student analogies (approximately 180 of them) into seven conceptual metaphors: Student analogies often showed aspects of more than one conceptual metaphor and were assigned to a group based on what seemed to be the primary focus of the metaphor. (traffic) correspond to moving charges (electrical current). Read full article. The The treatment closely follows that in Eckert and Drake (1959). This is almost always the assumption when analyzing DC circuits though not often stated. Students in each class were introduced to some common pedagogical analogies (ex. There are several references on other studies of student-generated analogies as well as on the use of analogies and language in helping students be creative and advance their ideas. This is interesting:  doubling the number of vaults. Then the cars encounter a stretch of rough road. So recall that enthalpy is really a good proxy for the change in bond energy that occurs during a reaction, that is to say whether or not energy was released or absorbed during a bond rearrangement. For most students, the least understood of the three circuit elements is the inductor. Figure 3: On the left, a two strength of this approach is that it forces a clear distinction Figure 1: As the charges go The students' analogies were coded for evidence of five characteristics of energy discussed in the literature: energy conservation, energy degrada-tion, energy transformations, energy Change ), You are commenting using your Google account. ), The expression “current flowing” is Analogies help in filling these pieces to make things clear. electrical circuit without explaining why. Lancor bases her metaphor analysis on the work of Lakoff & Johnson. symbol with the number of cells equal to the number of vaults. It is easier to remove electrons with less valence electrons. On the left is a series circuit and on the right its equivalent. ( Log Out /  1. to a pair of resistors in series is the sum of the individual resistances. But they must lose all of their jewels which, as we shall see, is a requirement of: KIrchoff's voltage law (KVL) which states that all the energy picked up in the battery must be transferred to the load. Another word for energetic. tedious, so as we continue, banks will be drawn using the battery These are the three basic building blocks required to manipulate and utilize electricity. (chemistry) or holes (transistors). Think of yourself under a blanket in a cold room. The band saw and rope circuit analogies are pretty good at explaining both current and energy. The concept of energy is widely employed in introductory science courses. Drawing banks and pictures of cars is play on words here, of course, is that the unit for energy is joules. To ensure that all 4 jewels are lost, the cars must travel at, Let's now examine the rate at which energy is transferred to the bumpy road. emphasis on formulas and numeric problem solving fails to give the jewel/car corresponding to the unit for electrical potential: one Miserandino then … On the right we see the equivalent circuit showing the single 5 bump road that would cause the same 2 cars/sec. voltage, but they they are also cumbersome. Over the 2 bump road, the rate is 6 cars/sec. with a car underneath, and zero or more jewels on top. The word vault is a The electronic–hydraulic analogy (derisively referred to as the drain-pipe theory by Oliver Lodge) is the most widely used analogy for "electron fluid" in a metal conductor.Since electric current is invisible and the processes in play in electronics are often difficult to demonstrate, the various electronic components are represented by hydraulic equivalents. cars travelling through pick up one jewel from each vault. framework on which to hang several basic electrical quantities. Very near the wall, the fluid motion is smooth and laminar, and molecular conduction and shear are important.