Answer:
Comets develop a fuzzy, cloud-like shell called a coma, as well as a tail.
Explanation:
This feature of a comet develops when the celestial body passes close to a star such as the sun. The ice around the nucleus of the comet sublimates forming the coma around the comment (when hit by light photons as observed from the earth). The tails are also formed by the ice being pushed a bit behind the comet by light pressure.
Answer:
yes
Explanation:
Revolution is the movement of an object around another object. So, Earth revolves around the Sun, and the Moon revolves around Earth. At the same time, Earth and the Moon are also rotating. Earth's rate of revolution is about 365 days (one year), and its rate of rotation is about 24 hours (one day).
The Answer is A
A sample of water is taken and kept in a beaker in a freezer at a constant temperature of 0°C. If the system is at dynamic equilibrium, which of these statements is true?
B)
![{ \purple{ \sf{tetrahedral}}}](https://tex.z-dn.net/?f=%7B%20%5Cpurple%7B%20%5Csf%7Btetrahedral%7D%7D%7D)
Explanation:
The lewis structure shape of PF4+ is tetrahedral with the positive charge on phosphorus atom.