Abstract

Citation

Researchers should cite this work as follows:

• Winkel, B. (2022). 6-035-Shampoo-ModelingScenario. SIMIODE, QUBES Educational Resources. doi:10.25334/A6FK-B412

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Article Context

Description

Our shampoo has a cap which we must unscrew and then set aside both bottle and cap in our shower hanging dish, thus leaving the shampoo bottle open for shower water to enter. In fact, we unscrew the top, set the top aside and then do two washes of our hair. We use one ``portion'' of shampoo for a first wash of our hair and a second equal ``portion'' of shampoo for the second wash of our hair.

Between the first and second wash when we set the shampoo bottle aside in our shower hanging dish a slight amount of water enters the shampoo bottle through the open top of the shampoo bottle. Some mixes in with the shampoo, but most sits in the top of the shampoo bottle. In our second wash some of that water comes out with the shampoo, reducing the concentration of shampoo ingredients we apply to our hair. After the second wash we set the bottle on our shower hanging dish until we are finished with our shower. At that time we recap the shampoo bottle, but in the meantime from the end of our second wash until we recap the shampoo bottle the shower water does enter the shampoo bottle. How much? Well it depends upon the length of our shower, the opening size of the shampoo bottle, the placement of the shower hanging dish, etc. Other considerations?