A closed, thin-walled, cylindrical pressure vessel has a radius of 100 mm, a wall thickness of 4.0 mm. It contains randomly oriented semi-circular cracks of radius a, for which one can assume thatIKaσπ=. The internal pressure is 10 MPa, and there is a torque of 50 kN·m applied to it. A design engineer selects a material with a yield strength of 900 MPa, and a fracture toughness of 35 MPa√m to be used for the pressure vessel. Is this a qualified engineer? Justify your answer.

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?