Write in complete sentences to explain each of the following examples in terms of heat transfer

$($indicate what loses heat and what gains heat$)$:

a$.$ Why the concrete sidewalk feels hot against your bare feet on a hot summer day.

$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ gains heat, and $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ loses heat.

b$.$ Why an ice cube melts in your hand.

$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ gains heat, and $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ loses heat.

c$.$ Why a stone countertop $($like the one in the lab$)$ feels cool when you place your hand on it$.$

$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ gains heat, and $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ loses heat.