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LOL Charts

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Objective: To use an energy bar chart to describe how energy is stored, transferred, and/or conserved for a variety of physical situations.

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Version 2.2.3

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Apprentice Level 4 Questions Relatively simple situations. A great warm-up.

Pick from among the three levels of difficulty -  Apprentice Level, Master Level, and Wizard Level.

Master Level Completed

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Master Level 8 Questions Slightly more complicated situations … now that your confidence is growing.

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Wizard Level 8 Questions Ya gotta know this stuff. For Wizards only.

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You have done it! You have successfully analyzed each of the situations. You have earned the Apprentice trophy.

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#11

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E Symbols

Directions: Tap E arrows to adjust bar heights. Tap on system to show direction of energy transfer (if any). Tap on energy transfer arrows to adjust amount.

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Tap below to ID the dir'n of E transfer across the system boundary.

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Yes, Return

The Energy Bar Chart (LOL Chart) represents the amount of energy stored in the various energy storage modes. The symbols have the following meaning: Ek - stands for kinetic energy. Eg - stands for gravitational potential energy. Ech - stands for chemical energy change (think of it as the use of energy stored in food or fuel). Eint - stands for internal energy change (think of it as the energy of particle vibrations … which is observed when objects heat up or sound is produced). Bar heights can be adjusted by tapping on arrows.

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To Main Menu

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The oval represents the system. You must indicate whether there is  a transfer of energy into the system or out of the system.  You can do this by tapping on the system (the oval);  continue tapping to toggle through the choices. Arrows indicate the direction of energy transfer; tap on an arrow (if shown) to change the amount of energy transferred; continue tapping to toggle through the choices.

System Arrows

Progress Report

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