100 kg of - is to be cooled from 10 degrees * C to - 20 degrees * C . The diameter of the Spherical liver equals 7cm. Assume that the density of the liver is equal to 1000 kg/m3 , heat transfer coefficient and convection equals to 50 W/m2 . K. (the air temperature equals -30 C.) A. chose one only 1- Using the specific heat, determine the amount of heat that must be removed from the lamb. 2- How much actual heat must be removed during this process? B. Estimate the time required for freezing. ​

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.