77K views · 688 reactions | This fixed center gear has 30 teeth, and the smaller gear has 10 teeth. How many times will the arrow flip over during one circuit? (It’s not 3.) Gear systems like this are an essential component of power transfer in hybrid cars.  https://brilliant.org/daily-problems/gears-and-reference-frames/ | Brilliant.org | Facebook

Back in 1935, dogs like Jack cleaned their teeth the natural way, by crunching on bones straight from the butcher. Today’s dogs? Soft kibble, easy chews, no fight for their teeth. Plaque wins, and by age 3, most face painful dental issues. We traded convenience for their health. But Mighty Munch brings back the natural cleaning action dogs once had....safely, without the risk of broken teeth. Because every dog deserves the dental health their great-grandfather had All orders are protected with o