Topic - Physics for my Child - 6 FULL SENTENCES REQUIRED - Use Words and TYPED O
ID: 3280580 • Letter: T
Question
Topic - Physics for my Child - 6 FULL SENTENCES REQUIRED - Use Words and TYPED ONLY
Instructions: USE Pascal’s and Archimedes’ Principles to answer the following: (6 SENTENCES MINIMUM)
Superman has cornered Lex Luthor by his factory’s drainage-pipe outlet in a river-carved canyon outside of Metropolis. Lex has offered to go peacefully to jail as long as Superman is able to complete three challenges:
A) Challenge I – Small stone, and boulder - 2 SENTENCES MINIMUM
For the first challenge, Lex demands that Superman use the weight of small stone to lift a boulder. Understanding the principles of fluids, Superman forms a hydraulic jack out of spare pipes, bits of metal, and river water. He places the small stone on the small piston, the boulder on the large piston, and, sure enough, the weight of the small stone raises the boulder sitting on the large piston. Explain how Superman used Pascal’s Principle to succeed.
B) Challenge II – Crushing a can - 2 SENTENCES MINIMUM
Lex hands Superman an empty aluminum bottle, and challenges Superman to crush the bottle without touching it. The man of steel scoops a little water from the river, pours it into the bottle, turns the water to steam using his heat vision, seals the bottle with a cork (without touching it), and waits. After about a minute, the bottle suddenly is crushed. Explain how Superman passed this challenge.
C) Challenge III – The 33 foot (10 m) straw - 2 SENTENCES MINIMUM
Finally, Lex Luthor challenges Superman to place one end of a 33 foot long vertical pipe into the river, fly up to the other end, and draw river water up the tube with his mouth. Unfortunately, even though the Last Son of Krypton can form a perfect vacuum inside his cheeks, he cannot complete this challenge and he must let Lex Luthor go. Explain how Lex was able to foil Superman.
Explanation / Answer
A) Pascal's law states that an exerted pressure anywhere on a confined incompressible fluid gets transmitted thought the fluid.
When superman places the stone on one side of the hydraulic system the weight of the stone creates a pressure on the fluid and it gets transmitted and lifts up the piston attached to the big stone. Only way to conserve the energy and volume of the fluid the small stone has to move a lot to make the big stone move just a bit, but it moves for sure, that's how Superman does it.
B)
Steam has a lot more volume than when it gets transformed into liquid by cooling. Steam inside a sealed can cools down and creates a lower pressure environment than the outer atmospheric environment of earth. So according to Pascal's this outer pressure of atmosphere acts on every surface of the can equally and crushes it.
C)
A straw works because the pressure on the surface of the liquid is more than the pressure inside. So the liquid rises up and the weight of this liquid column is exactly balances out both of the pressure.
i.e
weight of the liquid column + pressure inside = Pressure on the outer surface of the liquid.
Now the weight of the liquid column is proportional to its height. So if the inner pressure gets to zero, even then the weight of the liquid column will create a total pressure that equals to the outer pressure. This height, for river water is 32feet. So no mater how perfect the vacuum is, its not sufficient enough to lift the water up to 33 ft.