® Instruction Manual 012-07823B Matter Model Model No. ME-9825A 800-772-8700 www.pasco.
Model No. ME-9825A Table of Contents Equipment List........................................................... 3 Introduction ............................................................. 5 Equipment Setup ........................................................ 5 Assembling Atom Halves ..............................................................................................................5 Building a Cubic Atom Model....................................................................................
Matter Model Model No. ME-9825A Matter Model Model No. ME-9825A Equipment List 5 4 3 2 1 6 Included Equipment 3 Quantity Replacement Model Number 1. Atom Half 80 648-07820 2. Hex nut, 3/8 - 16 30 614-080 3. Heavy Spring 60 ME-9829 (set of 60) 4. Light Spring 60 ME-9830 (set of 60) 5. Long Spring 60 ME-9887 (set of 60) 6.
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Matter Model Model No. ME-9825A Introduction The PASCO ME-9825A is comprised of many components which, when assembled and reassembled in a variety of configurations, can be used to model many demonstrations. Some suggested uses can be found in the Activities section of this manual. Equipment Setup Assembling Atom Halves 1. Position two atom halves as shown in Figure 1 and snap together. Figure1: Snap together atom halves Building A Cubic Atom Model 1.
Model No. ME-9825A Matter Model Increasing the Mass of the Atom 1. Position one hex nut between two atom halves and snap together. See Figure 3. Figure 3: Snap together atom halves with nut Assembling A Longitudinal Wave Model 1. Seat the single closed winding at either end of a spring inside a cleat feature of an assembled atom model (with nuts). 2. Create desired longitudinal wave model by alternately assembling atom models and springs onto tube as shown in Figure 4.
Matter Model Model No. ME-9825A Assembling A Transverse Wave Model 1. Seat the single closed winding of a heavy spring inside a cleat feature of an assembled atom model. Be certain to attach springs along the seam of the atom to prevent splitting (fission) from occuring. 2. Create desired length transverse wave model by alternately assembling atom models and springs onto tube as shown in Figure 5.
Model No. ME-9825A Matter Model Activities Mechanisms of Normal Forces Figure 6: Demonstration of Normal Forces Students often have difficulty believing that solid objects, such as a table, can exert forces. Instead, they believe that the table simply "gets in the way" of the object. By using the matter model with a heavy book, students can see the atoms compress when the book is placed on it.
Matter Model Model No. ME-9825A Torque and Shear Forces Figure 7: Demonstration of Torque Forces The effects of torque and shearing forces can be demonstrated when the matter model is constructed in a 5 x 3 x 2 configuration. In addition, when supported only on one side a cantilever can be modeled effectively.
Model No. ME-9825A Matter Model Wave Speed and Density Each of the atoms is designed to allow an included nut to be inserted. In this way, students can change the density of the wave medium and observe the relationship between wave speed and density. This effect can be investigated for both transverse and longitudinal waves. Use the configuration suggested in the previous activity for transverse waves.
