Which part of a comet exists even when it is very far away from the sun?

Which element would mostly likely have an electron affinity measuring closest to zero

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?