Uma chaveta está sujeita a uma força tangencial de 12000 N. O eixo onde esta chaveta será montada possui diâmetro de 42 mm. Deseja-se utilizar na fabricação dessa chaveta o Aço ABNT 1045 (se = 400 MPa). O coeficiente de segurança a ser adotado no projeto é igual a 4, determinar o comprimento mínimo da chaveta para resistir aos esforços de cisalhamento. Dados: Largura da chaveta W = 12 mm e Altura H = 8 mm.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

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?

What are the two (02) benefits, which may result from a successful implementation of preventive maintenance (pm) program in an organization? (clo3)a)- lean manufacturing b)-overlapping responsibilities c)-the planner is not qualified d)-accurate contractor information e)-reduction in equipment redundancies f)-accurate stores information