What is distance?, Distance is the total path covered by an object, regardless of direction., Is distance a scalar or vector quantity?, Distance is a scalar quantity., What is speed?, Speed is the rate at which distance is covered., What is acceleration?, Acceleration is the rate of change of velocity with respect to time., If velocity is constant, what is acceleration?, Acceleration is zero..

排行榜

視覺風格

選項

切換範本

)
恢復自動保存: ?