# PROBEWARE

### (1) Free Probeware Resources

(a) Audio analysis

Sound is propagated through matter (air, water) as a wave. Sound can be analyzed by characteristics of waves which include frequency, wavelength, period, amplitude, and speed. The highest wave was generated at the frequency of 1300 Hz. Pitch is the frequency of sound and it can be high and low.

I do not have any of the following problems according to the vision tests: macular degeneration, protanopia, deuteranopia, red-green color blindness, problems with the pupil or focusing of one or both eyes that cause glare or blur, problems with the detection of the image by the retina or its transmission to the brain through the optic nerve that cause smudges in the field of vision, or problems with the brain in its attempt to combine the images from the two eyes into one image with depth perception.

I will use the followig test when discussing genetic disorders, such as color blindness.

(c) Response time & time estimation

Is your response time faster with audio or visual stimuli? Visual is a little faster

Test results of 3 trials: 27.6s, 33.1s, 29.5s. Average: 30.36s
RE= [(observed - actual)/(actual)]x100%:

### (2) Data acquisition with probes

Investigation: Inverse Square Law

Illustrate the inverse square law for illuminance using light probes, or the inverse square law for magnetic interaction using the magnetic sensor probes. Remember that ambient light and magnetic fields will influence your results.

Illuminance: ( E=illuminance; I= intensity of source; D=distance)

Magnetic force (M1 and M2= magnetic pole strengths, D=distance, k=constant)

Include a table and graph of your data and briefly discuss your results.

### (3) SIMULTANEOUS PLOTS OF PROBEWARE OUTPUTS

Investigation: The influence of solutes upon the heating/boiling characteristics of water

Study the effect of solutes upon the heating and boiling characteristics of water. Fill one beaker with water, and another with a salt solution. Place temperature probes in each of the two beakers, and place both beakers on the same hot plate that has been pre-heated to maximum temperature. (a) Include labeled printouts showing the heating curves of both beakers as a function of time. (b) What, if any, influence do the dissolved salt have upon the heating and boiling characteristics of water? Explain using your data.

 When salt was added to the boiling water, the temperature lowered by about 2 degrees quickly and slowely raised by 4 degrees.

### (4) DATA ACQUISITION WITH INDEPENDENT VARIABLES OTHER THAN TIME

Investigation: Boyle's Law

Although most probeware continuously records data as a function of time, it is possible to change the independent variable to another measure. In this activity we shall investigate Boyle's Law (P1V1=P2V2 ) by plotting the pressure of a sealed container as a function of its volume. Include a printout of the results and a brief discussion of their meaning.

### (5) USING PROBEWARE TO TEST UNDERSTANDING OF CONCEPTS

Investigation: Motion (distance, velocity, acceleration)

Examine each of the graphs below. Picture in your mind the motion that is being described, and then walk in such a way that the position, velocity, or acceleration of your body is reflected in the graph. Use the ultrasonic motion detector to analyze your movement and perform a screen capture of each activity. Include at least 6 graphs.

### (6) DESIGN THREE (3) OF YOUR OWN EXPERIMENT WITH PROBEWARE

Develop three (3) experiments using one or more of the probeware modules. Describe the experiment and its results, and include photographs or movies of your setup and pictures of your data. Probes: temperature probe, pH Amplifier, pH electrode, pressure sensor, colorimeter, thermocouple, light sensor, magnetic field sensor, barometer, relative humidity sensor, heart rate monitor, student force sensor, voltage measurement leads, ultrasonic motion detector, force probe, radiation monitor, and others.

 Titration of pure vinegar with baking soda. When salt was added to the boiling water, the temperature lowered by about 2 degrees quickly and slowely raised by 4 degrees. Light intensity at 3 different possitions.