The aim of carburization is to increase the carbon concentration in the surface layer of a steel to improve its wear resistance. If it takes 40 min to reach the desired carbon concentration at a depth of 1 mm, the time required to achieve the same carbon concentration at the increased depth of 1.5 mm is

i believe it is c.) 1575 j.

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

the product of the pressure and volume is also constant

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).