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diffraction & interference phenomena
Premium Quality: Boyle's Law Demostation is made of high-grade construction all the way through
Available in clear
Supplied with wax
Literacy practice for phase 2 of the letters and sounds program
16cm Giant Large Sand Timer Rulers diffraction & interference phenomena16cm Giant Large Sand Timer 30 Seconds with different colors Red Green Yellow Blue Orange New rounded design including a shatterproof plastic barrier to protect the sleek modernized glass bulb inside. 30 seconds has the time value embossed on the top. Large Sand Timer 30 seconds also has different color coded grains of sand. Excellent for classroom projects and purposes, Group projects, educational purposes, laboratory demonstration. If you need
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