Em/min/s(exametre per minute per second)

The unit Em/min/s (exametre per minute per second) is not a standard unit in the field of acceleration. In physics, acceleration is typically measured in meters per second squared (m/s^2).

It seems that the unit mentioned might be a result of a confusion or a typo. To clarify, an exametre (Em) is equivalent to 1 x 10^18 meters (m). If we were to try to interpret this unit in terms of acceleration, it would be exametres per minute, per second. However, this doesn't make sense, as acceleration should have a unit of distance per time squared - not distance per two different times.

It's important to use standard units when discussing measurements in physics to avoid confusion and ensure accurate communication of information.

µm/s²(micrometre per second squared)

The unit µm/s² (micrometre per second squared) is a derived unit of acceleration in the International System of Units (SI). It is used to express the rate of change of velocity with respect to time over a distance scale of micrometres.

One micrometre per second squared (1 µm/s²) represents an acceleration where an object's velocity changes by one micrometre per second (1 µm/s) every second. In other words, it signifies how quickly an object's velocity increases or decreases over time on a very small scale, in the order of micrometres (1 µm = 10^-6 meters).

This unit is typically used in fields such as microfluidics, micro-robotics, or any scientific research that involves the study of extremely small-scale motion and acceleration.