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(Developed for General Science, Properties of Matter Unit , Beginning Chemistry, grade 7; recommended for Chemistry, Environmental Science, and General Science, grades 6-9)
- victor joseph (U of Toronto, fremont, ca)
Subject taught: chemistry
Appendix-E of above article
The graph of Al, Fe,Sn & steel phase change temperature T in centigrad vs Time. The time axis is in what units hr, minutes, seconds or days?
- Brudvig Gary (Yale, New Haven, CT)
. It\'s Not Waste: Teaching Recycling through Density, Phase Change and Solubility
The time axis is arbitrary because the time required for the phase changes will depend on the size of each sample and the rate that heat is applied.
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