Ahelical compression spring is wound using 2.5 mm diameter music wire. the spring has an outside diameter of 31 mm with squared ground ends, and 14 total coils. a) estimate the spring rate b) estimate the static load corresponding to the yield strength c) what should the free length be to ensure that when the spring is compressed solid the torsional stress does not exceed the yield strength? d) determine if the spring might buckle in service.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

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?

Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed.gi) ifn 1, what will happen to the material when transformed material when