What cause a comet to look like it has a tail trailing behind it

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

What happens to isotopes that are unstable?