3. three metal spoons are on a table. they are each at room temperature. if the three spoons
touch,
heat will flow among all three spoons.
heat will flow between two spoons.
no heat will flow among the spoons.
o heat will flow from the spoons to the air.

If the spoons touch, no heat will flow among the spoons. This is because they are already at thermal equilibrium with each other. This is hinted by the statement "they are at room temperature" which means they all have the same temperature. Heat only flows when there is a difference in temperature.

The duration of a photographic flash is related to an rc time constantly