Hello, super scientist! Did you know that the engineering design process is a cycle? That means it repeats over and over again. After they test their solutions, engineers always think about how to make them better. This brings them back to the brainstorming step. The design process is repeated until the solution is the best it can be.

Review the Engineering Design Process worksheet to understand the steps of the engineering design process. what does this mean.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.