American Football relies on the 'instant replay', covered by television.
Instant potatoes, prepared and immediately covered with a lid will actually remain hot up to 30 minutes.
The velocity of an object (v) at any particular instant is the distance covered by that object (s) divided by the time interval (t) taken to cover the distance. When the velocity is changing, the instantaneous velocity is the distance covered in a very, very short time divided by the very, very short period taken to cover it. In differential calculus, this would be denoted by v = ds/dt By definition, then, s is the integral of v with respect to time. Graphically, this is the area under the velocity-time graph.
Zeno said zero. Speed is a function of time x distance. If an instant has no duration there can be no speed.
Because people are randomly adding your PIN & instant messaging you.
Telegraph and the Morse code.
Because when you look at the speedometer it is telling you your speed at that particular instant in time, it changes from instant to instant.