In casting experiments performed using a certain alloy and type of sand mould, it took 155 sec for a cube-shaped casting to solidify. The cube was 50 mm on a side. Find out the value of the mould constant (in sec/mm2 unit) using chvorinov's rule.

Case # 51173878 weighs 814 pounds; case # 51173981 weighs 803 pounds; case # 51174058 weighs 817 pounds; case 51174178 weighs 815 pounds; case # 51174248 weighs 817 pounds; case # 51174495 weighs 781 pounds; case # 51174577 weighs 828 pounds. what are the case #'s of the two cases that weigh the same amount?

He did chinese culture change during the warring states period

Consider the image seen here. the image, at point y, represents the process of during which a is being produced.