Which of the following is NOT true of polymethyl methacrylate ?
(A) Knoop hardness number 18 to 20
(B) Tensile strength of 60 MPa
(C) Density of 1.13 g/cm3
(D) Modulus of elasticity of 3.4 GPa
Which of the following is NOT true of polymethyl methacrylate ?
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