Small Crimson Riding CowlOnce upon a time, there was a lovely young girl named Little Red Riding Hood. One day, she decided to collect some delightful treats from her mother to bring to her kind old grandmother. She collected the items in a basket, whose volume when full displaced 4000 mL of 20°C water, which meant that its volume was 4000 cm---3. She took the basket under her arm, and began the 1000 meter journey to her grandmother's house. Her mother yelled out the door as it slowly closed, "Remember to stay on the path, Red!"
She skipped at a comfortable rate of 1.5 m/s for 500 meters, which took 33 seconds. She wandered off the path to search for flowers for her grandmother. Right then, a large Canis lupis approached her, slinking out of a grove of trees.
"Come here, little girl," the wolf condescendingly leered.
" What do you want with me, you filthy hairy monster?" the red-hooded girl shrieked indignantly. The food energy which her body converted to glucose was converted into sound energy by her vocal cords, which caused enough energy to make the wolf shrink back momentarily. The scream produced 1/1000th of a watt of energy, which translates to 1/1000 J/s. Since her scream lasted about 5 seconds, this means she produced a total of 1/200 J (0.0005 J).
"I smell your food. Give it to me!" he added malignantly.
"No, not this food. It's for my kind old grandmother!"
"You'll give me those tasty morsels to me, if you know what's good for you. Now, hand it-" Then, the wolf had a pleasantly malicious thought. I'll eat the grandmother, take her clothes, and then eat her food! he thought. He zipped off the remaining 500 meters to grandmother's house at a fast rate of 2.5 m/s, while Red continued at her normal rate. The wolf's trek took 200 seconds. In the 133 seconds remaining, he did his dirty work.
Then, right on cue, Red Riding Hood strolled up to the cottage and knocked on the door. Her food energy was converted again into glucose, which cause her muscles to move, making an amount of kinetic energy, which was transferred into sound energy, a small amount of thermal energy, and also some kinetic energy as she knocked on the door.
The girl inquired as sweetly and innocently as a baby, "Grandma? Are you there? It's me, Little Red Riding Hood!"
The wolf was in his place in bed. He said with a crackly voice, "Come right in, my beautiful Red."
Red strode in with her basket. She walked up to the bed naively and opened up her basket. "Grandma, I have some wonderful jelly for you, some bread, and even a thermos of hot soup, which is mostly made from water whose specific heat is 4190 J/kg°C. Because of the thermos, the water has lost little of its heat to the atmosphere and the thermos's own material."
She looked up from her basket, and thought her grandmother looked strange. Then, she spoke again. "Why grandmother, what large auricles you have to channel sound to you tympanum!"
"All the better to hear you with, my dear," the wolf wavered, trying still to sound grandmother-like.
"And grandmother!" she exclaimed. "What unusually gargantuan tissue sacks filled with vitreous humour and aqueous humour you have embedded in your cranium!"
"All the better to see you with, my dear," the wolf said more strongly, as he began to forget who he was portraying.
"And grandmother! What oversized incisors, cuspids, bicuspids, and molars you possess!" the girl cried, becoming naively worried that her grandmother's senility was getting the better of her.
"All the better to eat you with!" the wolf shouted with vile glee. Red clicked her heels together, as she saw that her grandmother was actually the wolf! She ran at a 3.0 m/s rate halfway back home. This took a relatively brief 166 2/3 seconds. At that time, a large, brave lumberjack saw little Red and her pursuer. He right then was sawing top off a 50-meter high tree. As he sawed, the limbs fell the full 50 meters at an acceleration of 9.8 m/s2. This trip took 3.2 seconds. The branches mostly all had a mass of 3 kilograms, so that the force it hit the ground at was 29.4 N.
The lumberjack was still high up in the 50-meter tree, but he thought of a way to trap the wolf. Little Red hid behind the tree, and the wolf sat in front of the tree, growling, "Little Red! Little Red! Please give me your food. I don't mean any harm!" He began to laugh, which seemed to discount his promise.
"I won't! I won't! You did something to my grandmother!" yelled Little Red, with fear pooling around her entire body.
"Well I justÉ" the wolf began. At that moment, the lumberjack dropped a 10 kg branch, starting with no initial velocity, from and exact height of 50 m above the wolf. Therefore, the journey took 3.2 seconds yet again, as the branch fell at an acceleration of 9.8 m/s2. It hit the wolf with a force of 98 N, which was enough to stun the wolf to the ground for a short while. Meanwhile, the lumberjack hoisted himself slowly down from the treetop to meet Little Red.
"Oh, thank you, sir!" she squealed with delight. "Thank you, thank- Wait," she paused, as a single tear formed in her eye. "What about my grandmother?"
She began to bawl like a baby, while the lumberjack stood aside. He opened up the wolf's mouth wide, and stuck his hand in. He then pulled out Little Red's grandmother whole!
"Hello there, Little Red!" the grandmother gasped.
"Why grandma! It really is you!" Red bellowed so that her words echoed about the forest. "Thank you, Mr. Lumberjack, sir!"
Grandma gave her gratitude as well, and they all feasted on the seemingly bottomless basket of food. The soup was still warm because of water's high specific heat of 4190 J/kg°C, which is almost ten times that of copper and zinc.
The wolf had received such an awful concussion, which he barely walked away from, that something significant had changed about him. He walked up to Little Red, unbeknownst to her, and let out a long, contented purr as he rubbed up against her back. She flipped around quickly to the wolf's surprise, and he said something to Red. He had to say it once more before she got it.
"Meo-o-o-o-ow," the wolf mentioned. He licked his paws, and then walked away in a feline stupor, leaving the three in a merry confusion.