Calculate the size of a surface crack that will lead
A high strength steel has a yield strength of 1460 MPa and a KIC= 98 MPa m1/2. Calculate the size of a surface crack that will lead to catastrophic failure at an applied stress of half of yield strength.
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Carbon monoxide in a piston-cylinder device is compressed from 1 bar and 37?C to 3 bar and 147?C. The compression process requires work input of 88 kJ/kg.
A power cycle operates between hot and cold reservoirs at 500K and 310K, respectively. At steady state the cycle develops a power outpoint of 0.1 MW.
Calculate the steady rate of entropy production, s& (kJ/K/s), by the power unit & by the refrigeration unit. Entropy production is not a good thing. Find the amount of unnecessary or lost power = TATM * s& (kW).
A cylinder/piston contains carbon dioxide at 1 MPa, 300oC with a volume of 200 L. The total external force acting on the piston is proportional to V3. The system is allowed to cool to room temperature, 20oC. What is the total entropy generation fo
A flange is used for instrument connection for a system with a design temperature of 316°C (600°F) and a design pressure of 1000 kPa (145 psi).
Water at 20 degrees celcius flows by gravity through a smooth pipe from one reservoir to a lower one. The elevation difference is 60m. The pipe is 360 m long, with a diameter of 12cm. Calculate the expected flow rate in m^3/h. Neglect minor losses
You have been asked to design a set of pumps to transfer liquid from a storage tank into a distillation column. What design issues do you have to consider ?
A 19th-century piston engine ran on steam. The steam supply is at 5 bar and 350oC. The steam discharges to the atmosphere at 1 bar and saturation temperature.
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Consider the freckles pedigree above. Circles are women, squares are men. Dark indicates that person has no freckles, open (white) indicates
Complete the statements to describe characteristics of autosomal dominant and autosomal recessive pedigrees. Choices may be used more than once.
Shao Mae takes medication to relieve depression. The medication increases her neural activity. However, immediately after firing, a neuron
Question: Completion of myelination in the CNS is one possible reason that:
Complete the following statements to describe polygenic inheritance. Some traits, such as skin color, are controlled by several sets of (Click to select)
Explain how bile is formed and the function of the gallbladder. Explain the most common cause of acute pancreatitis. What is the basic treatment?
Secretion of melatonin by the pineal gland will deactivate the ascending portion of this brain structure which, among other things,