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ERIC Number: EJ931196
Record Type: Journal
Publication Date: 2010-Nov
Pages: 8
Abstractor: As Provided
Reference Count: 17
ISBN: N/A
ISSN: ISSN-0031-9120
Mechanical Sensors and Plastic Syringes to Verify the Gas Laws without Neglecting Friction
Onorato, P.; Mascheretti, P.; De Ambrosis, A.
Physics Education, v45 n6 p586-593 Nov 2010
Two experiments are proposed to study Boyle's law and the pressure law in a school laboratory. The peculiar feature of the experiments is that the value of the pressure and of the volume are obtained respectively by means of a force and a position sensor, thus allowing students to connect, in an experimental context, mechanics variables, such as force and position, to thermodynamics ones, such as pressure and volume. Focusing on forces requires that students take into account the role of the friction force on the plunger, a force that is generally disregarded in standard experiments. Considering friction forces helps students to realize the complexity of a real experiment and appreciate the value and the limits of a quantitative measurement. (Contains 4 figures.)
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: info@ioppubusa.com; Web site: http://journals.iop.org
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A