Which one is a step of the traditional model for business workflow

Which of the following physical laws can make the flow of water seem more realistic? a. motion b. gravity c. fluid dynamics d. thermodynamics

Into what form does the barcode reader convert individual bar patterns?

This isn't about school but every time it tells me to watch an ad to unlock the answer to a question it prompts a survey and it just keeps loading. so i haven't been able to get answers for my tests in like a week.