Answer:
transmission: the passing of a wave through an object
Explanation:
The best type of electromagnetic wave to use to warm food that is safe would be the infrared wave. The correct answer is B.
Periodic time is the time taken for one complete oscillation by a body in circular motion. In this case the merry-go round takes 2 minutes to cover 15 complete oscillations. 2 Minutes = 120 seconds
Hence, 15 oscillations takes 120 secs
thus 1 oscillation takes 120/15 = 8 seconds
therefore the period of the merry-go-round = 8 seconds
I guess it’s d) isobaric mate correct me if I am wrong :D