Abstract:
The purposes of the study were to design and develop an experimenting kit to study wave resonance in closed end tube applying the principles of physics and electronics. The intervention of the research was the experimenting kit especially developed to study wave resonance in closed end tube using electric signal from generator. The range of frequency was 600 1600 Hz and the condenser microphone was used as an audio receiver. The sound signals would pass through signal conditioning circuits and when they came out, they were shown through an oscilloscope. Besides, students opinions towards the experimenting kit were also studied. The subjects of the study, selected by purposive sampling, were 115 engineering students who took the course Laboratory Physics2 (PHY224) in semester 1 of the academic year 2010. The obtained data were analyzed by SPSS statistical packages.
The findings of the study were as follows:
1.The efficiency of the experimenting kit of wave resonance in closed end tube, when tested at room temperature, yielded 1.08% difference of speed as compared with the speed of sound in air. And when the kit was tested at frequencies of 600, 800, 1000, 1200, 1400 and 1600 Hz, it was found that the standard deviation was between 0.070 0.237.
2.The mean (4.24) and standard deviation (0.719) of students opinions towards the developed kit showed that students were very satisfied with the treatment.
3.As for the rank of the subjects satisfaction towards the experimenting kit in terms of its physical features, the highest was appropriateness for practical use receiving the mean scores of 4.27 (S.D. = 0.626). The second to highest was availability of spare parts, receiving the mean scores of 4.24 (S.D. = 0.854). And the third was reparability and replaceability, of which the means scores were 4.19 (S.D. = 0.712). In terms of practicality, the item with the highest mean scores was easily connected with oscilloscope (mean = 4.50; S.D. = 0.646). The second to highest was ability to detect air speed of sound (mean = 4.37; S.D. = 0.655). And the third was easy installation, of which the mean scores were 4.37 (S.D. = 0.719)