C Ucke and H-J Schlichting 2009 Phys. Educ. 44 612 doi:10.1088/0031-9120/44/6/007
C Ucke and H-J Schlichting
Show affiliationsSnap discs made of bimetal have many technical applications as thermostats. Jumping discs are a toy version of such snap discs. Besides giving technical information, we describe physical investigations. We show especially how, through simple measurements and calculations, you can determine the initial speed (~3.5 m s−1), the acceleration (~30 000 m s−2) and the lower and upper snap temperature (~31; ~99 °C). High speed videos give even deeper insight into the jump.
Issue 6 (November 2009)
Received 27 June 2009, in final form 10 August 2009
C Ucke and H-J Schlichting 2009 Phys. Educ. 44 612
Takashi Okamasa et al 2006 J. Micromech. Microeng. 16 S198
D.C. Eder et al 2004 Nucl. Fusion 44 709
Yuan H Guan et al 2004 Smart Mater. Struct. 13 1230
E K Athanassiou et al 2006 Nanotechnology 17 1668
Paolo Amore and Francisco M Fernández 2010 Eur. J. Phys. 31 69
C Armendáriz-Picón and Vikram Duvvuri 2004 Class. Quantum Grav. 21 2011
Pia Astone et al 2002 Class. Quantum Grav. 19 1443
A Becker and F H M Faisal 2005 J. Phys. B: At. Mol. Opt. Phys. 38 R1
Bo Liu et al 2004 Semicond. Sci. Technol. 19 L61