How can you describe the cometary tail, like what parts does it have, and how are they arranged around the internal cometary core, and why?
Astronomy is the subject

Why are radio observatories located in valleys far away from urban centers? a. to shield them from electromagnetic interference b. to avoid sound pollution c. to avoid disturbing people living in the city d. to shield them from water vapor

Recycled water is best used for a) drinking b) bathing c) lawns d) dishes e) laundry

How are flextime and flexplace work accommodations different? one is flexibility in your work hours, and the other is flexibility in your work days. one is flexibility in your work hours, and the other is flexibility in your work place. one is flexibility in your work place, and the other is flexibility in the technology used. one is flexibility in your work place, and the other is flexibility in your work days.