If an object changes its position relative to you (or some other reference point) then it is moving relative to you.
you can use a motion sensor
A "sensor" is used to detect or measure something; in this case, it would be something to detect or measure gravity.
the answer to that is by vibration. in the wind.
The root word of "detective" is "detect," which means to discover or uncover something.
It's can see and detect moving things
wheather report on news channel 5
Yes, "detect" is a verb. It is an action word that describes the act of discovering or identifying something that is usually hidden or not easily seen.
Frequency-shift
Infrared proximity sensor.
They possess sensory tissues at the perifery of their slowly moving perimeters.
Yes, a radar gun can be used on any moving object.
Like al;l other frogs, redeyed treefrogs detect their prey visually. The can only detect moving objects.
Most can detect movement ten feet away, however some can detect twenty or thirty feet.