ruler
You cannot. You cannot ensure the lines are strictly parallel using only a ruler.
a ruler
Parallel
For that period of time, d(t) (the distance) is not changing so the motion is zero velocity.
a board that moves parallel in motion.
horizontal motion
what products use parallel motion linkage
Both parallel and perpendicular to the motion of the wave at the same time/Perpendicular to the motion of the wave/Parallel to the motion of the wave - APEXPerpendicular to the motion of the wave.Parallel to the motion of the wave.Both parallel and pependicular to the motion of the wave at the same time.
The motion is parallel to wave direction The motion is both parallel and perpendicular to wave direction. The motion is perpendicular to wave direction.
An Ancient Ruler.
billionaire
Yes
ruler
Longitudinal waves occur where the motion of the medium is parallel to the waves.
Longitudinal waves occur where the motion of the medium is parallel to the waves.
An example of a parallel motion linkage is a tool box that opens with multiple shelves.