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Why are stemless funnels used instead of long-stem funnels to filter hot solutions through fluted filter paper?
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- Water boils at 120 degree C in a pressure cooker. Explain the reason.Why does a beaker of 40.0ºCsize 12{"40" "." 0°C} {} water placed in a vacuum chamber start to boil as the chamber is evacuated (air is pumped out of the chamber)? At what pressure does the boiling begin? Would food cook any faster in such a beaker?When the temperature of a metal cylinder is raised from 0.0°C to 95.7°C, its length increases by 0.22%. (a) Find the percent change in density. (b) What is the metal? Use Table below. Some Coefficients of Linear Expansion Substance a (10 C) lce (at OC) Lead 51 29 Aluminum 23 Brass 19 17 Copper Concrete Steel Glass (ordinary) Glass (Pyrex) 12 11 3.2 1.2 07 Diamond Invar Fused quartz a5 "Room temperature values except for the listing for ice. "This alloy was designed to have a kow coeffi- cient of expansion. The word is a shortened form of "invariable" (a) Number i 0.66 Units percent (b) Steel
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