Answer:it is c i think
Explanation:
i have went through this class before
Answer:
Hello your question lacks some vital parts here is the complete question
Determine Er(10) for this material (in Mpa) If the initial stress level was 2.76 Mpa (400psi) which dropped to 1.72 Mpa(250psi) after 60s
Answer: Er(10) for the material = 2.55 / 0.69 = 3.695 ≈ 3.70 Mpa
Explanation:
The equation of stress decay for viscoelastic polymers
equation 1
t = elapsed time = 60s
T = relaxation time
input the given values into the equation
1.72 = 2.76 exp ( -
exp ( - 60/T ) = 1.72/2.76 therefore T = 126.87S
Considering 10s for t
taking Ln of both sides of the equation
Ln
therefore = 370 psi
To determine the Er(10) for the material in (Mpa) we apply the relaxation modulus equation
Er(t) =
where Eo = strain level = 0.69
Er(t) = E(10)
= 2.55 Mpa
input this variables into equation
Er(10) for the material = 2.55 / 0.69 = 3.695 ≈ 3.70 Mpa
Answer:
The correct option are;
American Institute of Architects
American Medical Association
American Society of Mechanical Engineers
Explanation:
A professional association is an association with the main purpose of promoting the basics and practices of a given profession. A professional association serves as a pillar for the interest of those practicing a particular profession and those of the best interest of the public.
The Business Professionals of America, DECA, Skills USA, and Future Educators are student associations while Screen Actors Guild is a labor union