Question

how does a foam - filled winter coat help keep a person warm?
it slows down the transfer of thermal energy from outside to inside the coat.
it slows down the transfer of thermal energy from inside to outside the coat.
it speeds up the transfer of thermal energy from inside to outside the coat.
it speeds up the transfer of thermal energy from outside to inside the coat.
it speeds up the transfer of thermal energy from inside to outside the coat.

Explanation:

A winter coat's purpose is to keep the wearer warm. Thermal energy (heat) naturally moves from warmer areas to cooler areas. Inside the coat (where the person's body is), it is warmer compared to the outside (in winter). A foam - filled coat acts as an insulator. Insulators slow down the transfer of thermal energy. So, it should slow down the transfer of thermal energy from the inside (warm) to the outside (cold).

Answer:

It slows down the transfer of thermal energy from inside to outside the coat.