## Browsing All Posts published on »August 23rd, 2010«

August 23, 2010 by

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Downloadable game that lets you drill on the periodic table, position of the elements, and the types of elements. To put an element of the periodic table into the right place, first click a numbered box and then click the element. To remove an element from the table, click it again (hint: colors can be useful)Good experience for constant acceleration problems. The zero is when a body in free fall, say, crosses the origin of your coordinate system.

August 23, 2010 by

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Downloadable simulation that lets you see how a second degree polynomial (aka, quadratic) changes shape when you change the coefficients. Get a good feel for how the graph changes. This Demonstration will also let you see where the zeros of the polynomial are. Good experience for constant acceleration problems. The zero is when a body in free fall, say, crosses the origin of your coordinate system.

August 23, 2010 by

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Downloadable simulation that lets you get a feel for how a second degree polynomial (aka, quadratic) changes shape when you fiddle with its coefficients. Adjust the coefficients of the parabola to hit all of the dots. Then, click the button to get a new set of dots. Good for constant acceleration problems, since distance vs. time is a quadratic for this situation.

August 23, 2010 by

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Downloadable simulation of how the sine and cosine functions are made from rotation through a circle. Get a feel for how trig functions relate to coordinates and lengths. Imagine a point that starts at and rotates counterclockwise on the unit circle. If is the length (in radians) of the arc on the circle between and the point, then as the point moves around the circle its and coordinates are the cosine and sine of .

August 23, 2010 by

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Downloadable simulation of how two vectors add using arrows and using components. This Demonstration illustrates head-to-toe addition of vectors in the coordinate plane. Initial and terminal ends of the vectors can be located in an [-8, 8] by [-8, 8] window.

## Fact sheet: Orders of magnitude in lengths (Wikipedia article)

August 23, 2010 by

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Well organized tables showing how large and small numbers are used. Table showing how nanometer, millimeter, killometer, etc. relate to each other and to real physical objects. Good for getting a feel for how the numbers are used and for making these small and large sizes comprehensible.