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This engineering permits just one to work with a finger, a stylus, or any other pointing unit over the area in the board. It enables teachers to build lesson programs, remedy issues, assessment former classes, perform lectures, or talk to students concerns during class time. Teachers also can hook up with mom and dad and students to aid online les

Boron carbide (chemical formulation B₄C) is often a boron–carbon ceramic and covalent substance that is Employed in tank armour, bulletproof vests, motor sabotage powders, and a range of other industrial programs. reply: the greatest advantage of introducing boron to steel is hardenability, with even smaller quantities increasing hardness dras