HS Mathematics-Physics SMILE
29 September 1998
Notes prepared by Alex Junievicz

Theresa Tobecksen [St Andrews, Calumet City]

She teaches elementary school-4th grade - all subjects

She showed a material tester, which had a flashlight bulb, a pin hole, and a mirror. It showed transmission of light. She showed a periscope. Also she showed a cylinder covered with mylar, where distorted pictures are made recognizable by the reflections from the cylinder. Roy Coleman commented about anamorphic art.

Alan Tobecksen [Richards Voc HS]

He showed a rope that was tied to each hand and between two people...and the objective was separate from one other. He left the resolution of the problem till next week.

Bill Shanks [Joliet Central HS, retired]

Free Fall....(glow in the dark ball which could be used to demonstrate eclipses and showers) Velocity vs time graph. It took Galileo to tame the concept of the complex relationships.

```time            velocity               distance
[sec]            [m/sec]               [meters]
0                  0                     0
1                -10                     5
2                -20                    20
3                -30                    45
```

He showed a bar 1.5 meters long with washers hanging down at regularly spaced intervals to a distance of 1.25 meters. He threw a ball and saw it was close to the washers. Now he tilted the bar upward and made a toss upward, showing that the ball still tracked the washers. He showed that the ball also could be made to track the washers on a downward tilt.

A baseball drops 1.2 meters between the pitcher and home plate---when the speed of release of the ball is about 40 meters/sec, or 100 mph. This vertical motion is difficult to predict, and is a major factor in making baseballs difficult to hit, and to catch.

Bill Colson [Morgan Park HS] He showed several articles relating to Science.

How to make sense of Science - Parade Magazine Sept 20. It is good to read about changes in science in places such as Parade Magazine; Chicago Tribune Magazine

Earl Zwicker [IIT retired]

He dropped an Iron plate with a magnet just above it.

```He showed it this way:  | ---------   |
|  Magnet   |
|           |
|  FE plate |
__________
```

When the assembly dropped the plate resting on the bottom comes up to the magnet but before they stay separated.