In a running event, a sprinter does $4\mathrm{.}4105$ J of work and her internal energy decreases by $8\mathrm{.}9105$ J$.$

$($a$)$ Determine the heat transferred between her body and surroundings during this event. $($Give the heat transferred to her body from the surroundings.$)$

J

$($b$)$ What does the sign of your answer to part $($a$)$ indicate?

Energy is transferred from the environment to the sprinter by heat.There is no heat transferred between the sprinter and the environment.$$Energy is transferred from the sprinter to the environment by heat.