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Showing posts from June, 2016

Light benders

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This summer laboratory ten was flipped with the section ten lecture to accomplish the laboratory in the computer laboratory. The video on color and light was then shown in A101 in the afternoon. This was followed up by showing a light and optics video the next regular class day in A101 in the morning, and running laboratory eleven on reflection and refraction in the afternoon. The following images are from the reflection and refraction laboratory.

Neikaman, Marmelyn, Sucy-ann

John and Gino
Marsha and Marlinda
Mayleen Samuel and Hansha

Marmelyn makes a measurement
Gino determines apparent depth
Shirley-Ann
Preston works out the apparent depth of the penny

RipStik wave and the speed of sound

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In the morning I followed up on the weather station visit by demonstrating a dry and wet bulb thermometer. I then demonstrated using a table to determine the relative humidity, heat index, and relative health risk of that heat index. This was followed by making a RipStik wave on poster pad paper in front of the south faculty building.


As the class was seated to the east of the entrance to the building, I opted to lay down the sheets on this slope. I used an uphill run but my turn-around had been sketchy on the east side of the sheets. Wobbly, I came in a tad slow with low amplitude. The initial wave length was 30 cm on an amplitude of only 2 cm. I accelerated up sheet ending on a 60 cm wave length and a 7 cm amplitude. This complicated the analysis.


A student timed the run, I held and drank coffee while riding. The time was 1.75 seconds for what was crudely some 4.75 wavelengths laid down across 248 cm of poster paper. This put an average period at 0.37 seconds, a frequency of 2.71 He…

Pohnpei Weather Service Office visit by physical science class

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On the day of the summer solstice in Micronesia, 21 June, the SC 130 Physical Science class most appropriately visited the weather service office in Kolonia.

The visit led off with a brief introduction to the operations center and some of the many roles the station plays. The station, in coordination with the weather service offices on Guam, provides weather information, tide, flash flood watches and warnings, storm watches and warnings, and a number of other services. They also translate critically important weather bulletins into the local language.

Marsha, Hansha, Shirley-Ann, and John listen to the presentation

The 10:00 local time launch of the LMS-6 radiosonde is imminent. Around the world radiosonde's are launched at the same universal time.


The balloon is filled with hydrogen


Getting into position with the radiosonde downwind of the balloon


The balloon will ascend to roughly 10,000 meters


The class shelters from the sun next to the balloon tracking station


Balloon released