Which of the following statements are IMPOSSIBLE? Choose all that apply. A. A pe

Question

Which of the following statements are IMPOSSIBLE? Choose all that apply. A. A perfectlyfunctioning hydraulic had a pressure of 29 Pa in the fluid near thesmall piston and a pressure of 38 Pa in the fluid near the bigpiston B. A 25 Lcontainer displaced 11 L of orange juice when partiallysubmerged C. A substanceunderwent melting during which its temperature remained constant at21 K D. A 27 oz brickwas fully submerged in water. The buoyant force on the brick was 19oz. As a direct result, the brick sank E. Last Saturday,the Sun heated the Moon via radiation F. The temperatureinside a vacuum chamber was measured to be 12 °F. Which of the following statements are IMPOSSIBLE? Choose all that apply. A. A perfectlyfunctioning hydraulic had a pressure of 29 Pa in the fluid near thesmall piston and a pressure of 38 Pa in the fluid near the bigpiston B. A 25 Lcontainer displaced 11 L of orange juice when partiallysubmerged C. A substanceunderwent melting during which its temperature remained constant at21 K D. A 27 oz brickwas fully submerged in water. The buoyant force on the brick was 19oz. As a direct result, the brick sank E. Last Saturday,the Sun heated the Moon via radiation F. The temperatureinside a vacuum chamber was measured to be 12 °F. B. A 25 Lcontainer displaced 11 L of orange juice when partiallysubmerged C. A substanceunderwent melting during which its temperature remained constant at21 K D. A 27 oz brickwas fully submerged in water. The buoyant force on the brick was 19oz. As a direct result, the brick sank E. Last Saturday,the Sun heated the Moon via radiation F. The temperatureinside a vacuum chamber was measured to be 12 °F.

Explanation / Answer

A. A perfectly functioning hydraulic had a pressureof 29 Pa in the fluid near the small piston and a pressure of 38 Pain the fluid near the big piston --IMPOSSIBLE ! This is because, according to Pascal's law, when pressure isexerted on a fluid, it is transmitted equally to every part of thefluid. However, near the big piston, Force will vary becauseP=F*A. F. The temperature inside a vacuum chamber wasmeasured to be 12 °F. --Questionable..... The reason cited by the other user is perfectly valid. In a vacuum,there are no particles, and since thermal variations occur due toexcitation of matter, technically, the temperature of the vacuumshould be absolute zero. However.... Inside the vacuum chamber, there exists a thermalequilibrium with its surroundings. There is constant interactionswith the walls of the chamber and the outside world which allowsthe vacuum to gain a constant specific temperature.Even thoughthere is no matter, electromagnetic radiations(which can passthrough vacuum) will pass their energy into and out of thevacuum. When we talk of measuring, there is only one way to do it. Tomeasure temperature, we must introduce some form of matter insidethe vacuum like a thermometer. This matter will be able to sensethis thermal equilibrium temperature and thus will give you adefinite temperature. Think of it this way. Space is a vacuum right ??? So why dospaceships burn up when they move closer to the sun ? It is becausethey are matter, and they do experience electromagnetic energy.Thus, when we talk of 'measuring' temperature, thisstatement is POSSIBLE.

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