Why is so Bernulli's principle so important?

Derive the viscoelastic equation for the four-element model.

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It's important to explain the fundamentals of strain hardening. Is this technique still reliable in hot conditions? Explain

Consider two cylindrical rods of metal are reduced by a drawing operation: one from Do= 45mm to 15mm and the other from Do=80mm to 30mm. a) what is the longitudinal true strian assuming volume constancy b) which strip will recrystallize at a lower temperature and why

Pick the best soultion for the multiple choices.  Modulus of resilience is: Slope of elastic portion of stress – strain curve Area under the elastic portion of the stress –strain curve Energy absorbed during fracture in a tension test Energy absorbed during fracture in an impact test Slope of the plastic portion of the stress- strain curve                         (   ) Fatigue failure occurs under the condition of: High elastic stress High corrosivity High stress fluctuations High temperature High rate of loading                                                                                     (   )   Creep failure of a material occurs most rapidly when the operating temperature is: Cryogenic temperature Equal to its melting point Grater than 0.4 times its melting point in K Greater than 200 oF Close to boiling point                         (   )   Young’s modulus of a material is indicative of its: Tensile strength Yield Strength Ductility Stiffness Corrosion Resistance…

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Case Study Calculate the Tensile Toughness Tensile toughness measures the total energy absorbed prior to fracture and is different from fracture toughness and impact toughness. Fracture toughness measures the resistance to fracture when a flaw (i.e. crack) is present in the material. Since it is nearly impossible and costly to manufacture materials with zero or near zero defects, fracture toughness is a major consideration for all structural materials. Impact toughness measures a materials ability to withstand an impact blow (i.e. high strain rates) and is particularly important in assessing the ductile-to-brittle transition behavior (more details later). Impact toughness is also commonly referred to as notch toughness. The tensile toughness can be estimated using the stress-strain curve by measuring the area under the curve (both the elastic and plastic regions). Tensile Toughness = f Stress, σ Ty- Ey Efracture ETS Ur Ey Efracture o de = U₁ + SETS o de + Sefracture o de Ey Ey o de =…

(3) Metals tend to expand when heated and contract when cooled. If a clock has a pendulum made of a bob attached to the end of a metal rod (as opposed to the string we used in our lab), completely describe the effect that temperature would have on the accuracy of the clock (i.e., would the clock run too fast or too slow) and why? k