21. What do the Izod and Charpy impact test measure? 1.The energy required to break a sample II.The strength of a sample III.The glass transition temperature A. B. C. D. I only Il only Ill only I and III

21. What do the Izod and Charpy impact test measure? I.The energy required to break a sample II. The strength of a sample III.The glass transition temperature A. I only B. II only C. III only D. I and