Physics 1 Questions & Answers

Physics 1 Questions & Answers 2nd law in terms of efficiency in mathematical terms - ANSWER: eff= work output. energy input= 100 2nd law in terms of efficiency in works - ANSWER: the more the disorder of a system, the less the efficiency of the system- more energy dissipated and less converted to work 2nd law in terms of entropy - ANSWER: all energy dissipates- spreads out infintely thin across the universe a certain type of decorative lamp contains colored liquids. these liquids form globs that break off and rise to the top of the liquid. the globs rise due to - ANSWER: convection a certain type of stainless steel cookware has a layer of copper applied to the bottom to help it heat evenly. the copper transfers heat to the pan by - ANSWER: conduction a chair is places several feet from a fire in a fireplace. the fireplace has a glass screen. the side of the chair facing the fireplace gets warm because of - ANSWER: radiation a college student holds the back of his hand near an iron to see if it is hot. heat is transferred to his hand by - ANSWER: radiation a fireman feels a door and it is hot from the fire on the other side due to - ANSWER: radiation a heater is placed under one corner of a water bed matress. warm water moves throughout the matress because of - ANSWER: convection a house burns down. on the house across the street, all of the vinyl siding is twisted and warped by the theat. the heat was transferred across the street by - ANSWER: radiation a huge rock at the state park gets so hot during the day that you cant sit on it from - ANSWER: radiation