Physics
12.12.2021 01:45
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Một vật dao động điều hòa theo phương trình x = 3cos(2πt - π/3), trong đó x tính

Một vật dao động điều hòa theo phương trình x = 3cos(2πt - π/3), trong đó x tính bằng xentimét (cm) và t tính bằng giây (s). Hai thời điểm đầu tiên lúc vật có tốc độ cực đại là A. t1 = 1/12 (s), t2 =7/12 (s) B. t1 =5/12 (s), t2 =11/12 (s)
C. t1 =6/12 (s), t2 =2/3 (s) D. t1 =1/3 (s), t2 =11/12 (s)
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allieeastridge
allieeastridge
4,6(95 marks)
A. can be pulled out, or drawn into a long wire. 

ductility is a property when materials stretch out under tensile stress. ductile materials can be stretched into a wire. it should not be confused with malleability which is the property of materials to deform under compressive strength, such as being hammered or rolled into flat sheets and other shapes. 

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