Answer:
Exposing objects to beams of radiation is called irradiation
820 meters is the longest
The sign associated with the average velocity of the object is negative.
<h3>
Average velocity of the object</h3>
The average velocity of the object is calculated as follows;
Average velocity = (v1 + v2)/2
v1 = -20/30 = -0.667 m/s
v2 = 20/50 = 0.4 m/s
Average velocity = (-0.667 + 0.4)/2
Average velocity = -0.134 m/s
Thus, the sign associated with the average velocity of the object is negative.
Learn more about average velocity here: brainly.com/question/6504879
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A period is a form of grammer , and it is used to end a sentence
Answer: The length L of the wire used to construct the coil is 191.4m
Explanation: Please see the attachments below
