If forces open the crack past its critical size the crack will travel at the speed of sound connect with all the other micro-cracks and shatter the ceramic into thousands of shards. The insurance company replaced the glass. Da…
Toughened or tempered glass is up to five times stronger than regular plate glass can withstand surface compression of more than 10000psi and is highly resistant to thermal breakage. The ability of a singer to shatter glass is d…