Average velocity = displacement / time
In this case, since you move left 60, then right 60, you return to the starting point making the displacement zero.
average velocity = 0 / 60 sec = zero
the average speed is calculated using total distance traveled.
average speed = distance / time
average speed = 120 meters / 60 sec = 2 m/s
<span>It tells how hot it really feels when the relative humidity is factored in with the actual air temperature.
hope this helps</span>
Answer:
We obtain the average velocity instead of the instantaneus velocity.
Explanation:
The problem with calculating speed in this way is that an average speed is being calculated and not an instantaneous speed at a given point.

To calculate the instantaneous speed, a very small space interval must be measured at a given time.
A < B < C
C will increase faster than B which is faster than A
Answer:
To see objects smaller than microscopic limits
Explanation:
The theory of Relativistic Quantum mechanics can be applied to particles that are massive and propagates at all velocities even those which are comparable to the speed of light and is capable to accommodate particles that are mass less. This theory find its application in atomic physics, high energy physics, etc.
It is necessary to use relativistic quantum mechanics when it is desired to see the objects that are too small to be seen with the help of microscope.