Chapter 14, Problem 16Q

Part (a):

To determine

The direction of the reversible ceiling fan to be set for summers.

Answer to Problem 16Q

Solution:

Forward direction

Explanation of Solution

A ceiling fan must be set in the forward direction so that it rotates in counter clockwise direction as it makes more breeze when it is set to blow the air down.This also accelerates the evaporation from our skin causing cooling.

Part (b):

To determine

The direction of the reversible ceiling fan to be set for winters.

Answer to Problem 16Q

Solution:

Reverse direction

Explanation of Solution

In the winter, the fan should be set to pull air up.It should rotate in a clockwise or reverse direction to redistribute warm air, which naturally rises to the top of the ceiling. This forces the warmer air at the top of the room to move out toward the walls and down.