Oscillating charges. (Electric current that goes back and forth periodically.)
a bus that runs back and forth is a shuttle.hi i love you
Back and forth in the direction of propagation of the sound waves.
the particles in a surface water move back- and- forth only.
A fan
a grin
Windshield wipers.
Windshield wipers.
A rally, is when the ball constantly goes back and forth, between the two teams.
when a river winds back and forth, it is called meandering
AC (alternative current) goes back and forth (the flow of the current changes periodically) DC (direct current) has a continuous flow
it goes back and forth
a grin
it goes back and forth on a string and amuses people
if it goes back and forth 2x in 5 seconds, 50 times that is 50x5 or 250 seconds, aka 3 min 10 sec
Because the river want to turn 180 degree.
it goes back and forth really fast