By Joan Horvath
This e-book exhibits mom and dad and lecturers find out how to use the versions within as beginning issues for 3D printable explorations. scholars can commence with those types and range them for his or her personal explorations. not like different units of versions that may simply be scaled, those versions have the technology integrated to permit for extra perception into the elemental concepts.
- Create (and current the technological know-how at the back of) 3D revealed models.
- Use a 3D printer to create these versions as easily as possible.
- Discover new technological know-how insights from designing 3D models.
Parents and teachers
Read or Download 3D Printed Science Projects: Ideas for Your Classroom, Science Fair, or Home PDF
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Additional info for 3D Printed Science Projects: Ideas for Your Classroom, Science Fair, or Home
We show the equations in the form that assumes radians, since it is much simpler to understand. The two waves being superposed in Listing 2-1 are calculated in degrees. In radians, the first term would be cos(5r/6) and the second term, 4*sin(r/6). Listing 2-1. 5) ) + 4* sin( (30/PI)*x) +5; thick = 3; //set to 0 for flat bottom. else mm thickness of surface Two Interacting Sources What happens if we have two interacting point sources at one edge of the plane we are modeling? The model for that is given in Listing 2-2, and the model we printed is in Figure 2-4.
Figure 2-2. The plane wave alone 20 Chapter 2 ■ Light and Other Waves Figure 2-3. Plane wave and point source interaction ■■Note OpenSCAD assumes degrees in all its trigonometric functions, and here radians are far more convenient. 2π radians = 360 degrees. This requires multiplying by 2π/360, or π/180, quite often in what follows. We show the equations in the form that assumes radians, since it is much simpler to understand. The two waves being superposed in Listing 2-1 are calculated in degrees.
As we will talk about later in the chapter, we will not normally 3D print these models such that the x and y axes of the models are printed aligned with the x and y plane (parallel to the build platform) of the 3D printer. When we talk about x, y, and z in this chapter, we mean the coordinates of the model. Finally, OpenSCAD uses degrees in its trigonometric functions. In most of our illustrations, we talk about angles in radians, since that is how most textbooks present the problems, and also because it works out conveniently in many more advanced topics, should you choose to keep going.