Q
Which of the following is NOT true of polymethyl methacrylate ?
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A
A. Knoop hardness number 18 to 20
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B
B. Tensile strength of 60 mpa
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C
C. Density of 1.13 g/cm3
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D
D. Modulus of elasticity of 3.4 gpa
Correct Answer:
D. D. Modulus of elasticity of 3.4 gpa