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After any emergency, the first question people ask is where do you get clean water to drink from?
After any emergency, the first question people ask is where do you get clean water to drink from?
I seen an video on youtube. they heated an Tungston metal using an convex lens and melted metals using the sunlight. if the metal is immersed in a water. then we can boi ... See More
Hello everyone i am fresh mechanical engineer and obviously as fresh engineer i have less experience in field and obviously my questions will also be strange ,anyway i am ... See More