material that has a fracture toughness of 33 MPa-m0.5 is to be made into a large panel that is 2000 mm long by 250 mm wide and 4 mm thick. If the minimum allowable total crack length is 4 mm, what is the maximum tensile load in the long direction that can be applied without catastrophic failure with a safety factor of 2.5

Agas mixture with a compostion of 55 methane, 30% propane, and 15 butane by volume) is compressed from 1 bar and 25°c to 9bar in a compressor with an isentropic efficiency of 85%. the environment has a temperature of to25 c. determine (a) the exit temperature of the mixture (b) the specific work required to run the compressor (c) the specific entropy generation of the process (d) the specific exergy destruction of the process (e) the second law efficiency of the compressor