Motion
Its average speed.
The speed of an object as a certain point in time is its instantaneous speed.
Of how much its position changes in a certain time.Of how much its position changes in a certain time.Of how much its position changes in a certain time.Of how much its position changes in a certain time.
A change in position in a certain amount of time is called motion.
They are the objects whose measured speed as a function of time agrees well with theory.
The speed of an object at one instant of time is its instantaneous speed.
Instantaneous Speed.
Speed of an object at one instant of time is the object's instantaneous speed.(Not velocity.)
Speed is distance/time or distance per unit of time. It is velocity that is distance/time in a given direction. Velocity can be said to be speed in a certain direction.
Average speed
The distance that a wave travels in a certain amount of time is a wavelength. Wrong,it's speed.(:
The speed of an object can be found by dividing the distance travelled by the object by the time taken for the object to travel that distance. Speed=Distance/Time