That's the definition of the PERIOD of the vibration.
It's exactly the reciprocal of the vibration's frequency.
Animals don't make Their own food. they instead depend on the food made by plants. hence no need for chloroplasts
Technician A and B are correct . Because according to technician A, the cause written on the repair order is a diagnosis. Here, by diagnosis, he means that the problem is identified after examining the device and hence the judgement is made.
And according to B, you have to write the cause of the problems in the device that have been identified and the concern measures, which is also kind of diagnosis.
So, option D is correct.
