7 All matter is made up of atoms and molecules.(a) Describe the arrangement, separation and motion of gas molecules.arrangementseparationmotion 相关知识点: 试题来源: 解析 (a) 描述气体分子的排列、分离和运动。 ### 排列 气体分子的排列是非常松散的,它们之间的距离相对较大,没有固定的位置,可以自由...
Explain how air is made to exit the lungs.1. Air is forced out the lungs during exhalation.2.During exhalation,the gxternal Intercostal muscles relax while thelnternal intercostal muscles contract (antagonistic muscles).3.Thls causes the rib eaag to move in an lnward and dowmwarddirection.The...
Red is the colour with the longest wavelength; that means that as it travels through air molecules, it gets diffused(扩散)less than other colour, so it can be seen from a greater distance. Yellow has a shorter wavelength than red but a longer wavelength than green. This means that red is...
aOne reason is that odor molecules move much more slowly as the air temperature drops, said Pamela Dalton, an olfactory scientist at the Monell Chemical Senses Center in Philadelphia. That means that there are simply fewer smells to smell on a cold, crisp day than there are on a hot and ...
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It is all about how different materials are put together and made up of atoms and molecules. Additionally, chemistry is how these materials act under different conditions. Slime is a non-Newtonian fluid. A non-Newtonian fluid is neither liquid nor a solid. It can be picked up like a solid...
Obtain exhaustive fragmentation information for all small molecules, while avoiding fragmention of the same ion twice with automated exclusion list updates over multiple iterative injections. Intelligent exclusion of ...
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Professor: OK. Last time we finished going over some of the fundamental concepts of nanotechnology, the multi-disciplinary science of manipulating or controlling extremely small units of matter on the scale of molecules or even atoms. 教授:好。上次,我们完成了纳米技术一些基本概念的学习,纳米技术是一...