Amber asked her roommate to turn down the radio because she was trying to study. her roommate had increased the volume from a volume level of 14 to 15. this was just enough for amber to detect the increase and subsequent decrease. amber's detection of the increase and decrease of volume is an example of

Difference threshold or also Just Noticeable Difference

Explanation:

The above mentioned case between room mates, where one room mate was able to detect a minute change in volume shows an instance of the difference threshold.

Difference threshold can be defined as stimulation at its minimum level that can be detected by an individual almost 50 % of the times.

It is the lowest possible level of sound that is detectable by a person.

That is what happened in the mentioned case that when the volume was increased from 14 to 15, Amber was able to detect it.

we need to know the time interval during which the force acts. impulse of force = momentum change

so easy. just google the electromagnetic waves and it’ll pop up.