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In a very old tale, a nymph, a simple imaginary woodland creature, is walking through the forest in a snowstorm. She meets a traveler wandering lost and cold. The nymph feels sorry for the man and invites him to her home for lunch. The man accepts, then sits by the nymph’s fire, blowing on his fingers to warm them.
The nymph asks the man what he is doing. She’s very impressed when she hears the man can warm himself that way. Lunch is served. The man blows on his soup and tells the nymph that he is cooling it down.
The nymph is astonished. How can the same mouth, she asks, blow both hot and cold? Angered at the man’s double dealing, she drives him back out into the forest.
Because the nymph is imaginary, and the tale is set in a long-ago time, the nymph does not know about the relationship between kinetic and thermal energy. How could analyzing that relationship have helped the nymph and saved the lost man from being sent back out into the storm?
(2 points)
Analyzing the relationship between kinetic and thermal energy could have helped the nymph understand the man's ability to blow both hot and cold.
Kinetic energy refers to the energy of an object in motion, while thermal energy refers to the energy associated with the temperature of an object. When the man blows on his fingers, the movement of air increases the kinetic energy, causing friction and generating heat, which warms up his fingers. On the other hand, when he blows on his soup, the same principle applies, but the increased kinetic energy dissipates the heat from the soup, causing it to cool down.
By understanding this relationship, the nymph could have recognized that the man was not double dealing or being deceptive. Rather, he was simply utilizing the concept of kinetic energy to warm or cool objects depending on the situation. This understanding could have prevented the nymph from becoming angry and driving the man back out into the storm, ultimately saving him from the harsh conditions.