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Nunn, John – Physics Education, 2014
This paper describes how a microphone plugged in to a normal computer can be used to record the impacts of a ball bouncing on a table. The intervals between these impacts represent the "time of flight" of the ball. Since some energy is lost in each rebound, the time intervals get progressively smaller. Through calculation it is possible…
Descriptors: Science Instruction, Acoustics, Science Experiments, Computers
Hurek, Jozef; Nackiewicz, Joanna – Journal of Chemical Education, 2013
A simple method is presented for the consecutive determination of protonation constants of polyprotic acids based on their formation curves. The procedure is based on generally known equations that describe dissociation equilibria. It has been demonstrated through simulation that the values obtained through the proposed method are sufficiently…
Descriptors: Science Instruction, College Science, Chemistry, Computer Uses in Education
Lawlor, T. M. – Physics Teacher, 2008
The widely used PASCO laboratory equipment is an excellent way to introduce students to many topics in physics. In one case, PASCO's equipment may be too good! Various experiments exist for calculating the kinetic coefficient of friction by measuring the acceleration of a sliding object under some constant force. With ever more accurate equipment,…
Descriptors: Intervals, Kinetics, Physics, Laboratory Equipment
Pereira, Constantino Fernandez; Alcalde, Manuel; Villegas, Rosario; Vale, Jose – Journal of Chemical Education, 2007
The four types of ionic equilibria--acid-base, redox, precipitation, and complexation--have certain similarities, which has led some authors to develop a unified treatment of them. These authors have highlighted the common aspects and tried to find a systemization of the equilibria that would facilitate learning them. In this unified treatment,…
Descriptors: Chemistry, Computation, Science Instruction, Foreign Countries

Galban, Javier – Journal of Chemical Education, 2004
A simplified mathematical model for the calculation of imprecision associated with the construction of a calibration line is presented. The model also aims at a discussion on variables that really affect it and to integrate the resulting imprecision with that caused by the other steps in the analytical method in order to calculate a real…
Descriptors: Mathematical Models, Intervals, Computation, Regression (Statistics)
Helms, T. C.; Doetkott, C. – Journal of Natural Resources and Life Sciences Education, 2007
We developed educational software to show graduate students how to plan molecular marker experiments. These computer simulations give the students feedback on the precision of their experiments. The objective of the software was to show students using a hands-on approach how: (1) environmental variation influences the range of the estimates of the…
Descriptors: Intervals, Computer Software, Graduate Study, Genetics