Blow on your hand with your open mouth and you feel the warmth of your breath. Pucker your lips so your breath expands as you blow and your breath is
A) warmer still.
B) cooler.
C) neither warmer nor cooler.
Answer: B
Blow on your hand with your open mouth and you feel the warmth of your breath. Pucker your lips so your breath expands as you blow and your breath is
A) warmer still.
B) cooler.
C) neither warmer nor cooler.
Answer: B