How can an electric field move from a positive test charge

Arrows on the field lines indicate the direction of the field, i.e. the direction in which a positive test charge would move if placed in the field. Electric field lines point away from positive charges (like charges repel) and towards negative charges (unlike charges attract)

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

0.11 m/s and 0.28 m/s should be correct