How is the boiling point of water affected when some salt is added to it? A gas thermometer registers an absolute pressure of 305 mm of mercury when in contact with water at the triple point. What pressure does it read when in contact with water at the normal boiling po...
According to NOAA, La Niña is the cooler phase of a weather pattern known as El Niño/Southern Oscillation (ENSO) with El Niño being the warmer phase. La Niña develops when the waters of the tropical Pacific Ocean are cooler. El Niño develops when the waters are warmer....
【3】C 根据“As mercury (or any other liquid ) becomes hot, it expands. As it gets colder, it contracts(收缩).”可知,本段讲的是温度计的原理,C项“既然了解了温度计的工作原理,你可以自己动手制作温度计了”,与段落联系最紧密,可知选C项。 【4】F从第五段开始,讲的是制作温度计的步骤,根据“...
Back toPreface Sub-TOC. DISCLAIMER This document is still under development and will probably continue to be in this state until will beyond the time when the Sun turns into a red giant or Hell freezes over, though the Engineers may be able to prevent the latter, at least. :-) ...
what is it demo Physics what the heck is this Log into post comments More like this A demo for the color black What do you see when you are in a completely dark room with no lights? That is a great question to ask. It can bring out some interesting ideas. Anyway, here is an easy...
I actually didn't realize that was the definition of a supercooled liquid. I had heard the term before, but just assumed it was a substance that could be naturally cooled to a very low temperature before it froze solid. I feel like I've heard the term used a fair amount but when I ...
On the Celsius scale water freezes at 0 degrees and boils at 100degrees. F. Take wax (you may use an old candle if you have one) and melt some of it right where the straw is struck into the cap to seal(把..粘住) them together. G. People use thermometers which are made by themse...