Astream of refreshing beverage of diameter d =0.01 m flows steadily from the cooler of diameter d=0.20 m determine the flowrate, q, from the bottle into the cooler if the depth of beverage in the cooler is to remain constant at h=0.20 m.

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

it's c (engineer's do their work with mechanical stuff not on any living being)