A 23 kg collar slides without friction along a vertical rod as shown in the figure attached. The spring attached to the collar has an undeformed length of 6.20 cm. and a constant of 2 kN/m. If the collar is released from rest in position 1, determine its position where it has stop and returned.

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?

The process in which the system pressure remain constant is called a)-isobaric b)-isochoric c)-isolated d)-isothermal

The power source in a certain welding setup generates 3500w that is transferred to the low carbon steel work with a heat transfer factor of 0.85. the melting factor in the operation is 0.45. a continuous fillet weld is to be made with a cross-sectional area of 23 mm2 determine the travel speed at which the welding can be accomplished.