To rapidly cool white wine grape musts for premium quality white wine pro- duction, dry ice is added to the must immediately after crushing the grapes. calculate the amount of dry ice per kg of must required to cool the must from 25 °c to 10°c if the heat capacity of grapes is 3.6 kj/kg"c, the enthalpy of dry ice is -31.9 kj/kg and the enthalpy of co2 gas at 10 °c and 1 atm pressure is 380.9 kj/kg.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

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?

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery