In a classic (or early) experiment to determine how large the forces are that allow leaves to pull water from the soil, the rate at which water flowed from a reservoir into the cut tip of an actively transpiring plant was the flow rate through the branch tip when it was subsequently attached to a vacuum pump.

low freq = 100 mhz

low wavelength =101.7m

length = 3x10^8/freq

c

explanation:

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.