22savage2017
03.03.2020 •
Mathematics
Chlorofluorocarbons (CFCs) were used as propellants in spray cans until their build up in the atmosphere started destroying the ozone, which protects us from ultraviolet rays. Since the 1987 Montreal Protocol (an agreement to curb CFCs), the CFCs in the atmosphere above the US have been reduced from a high of 3200 parts per trillion (ppt) in 1994 to 2750 ppt in 2010.15 The reduction has been approximately linear. Let C(t) be the concentration of CFCs in ppt in year t.
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Ответ:
If a large cloud encounters a colder air mass, it tends to rise up in the sky. On the other hand, the cold air mass sinks toward the surface. This happens because temperature is a property that affects the density of substances. Colder substances are denser than warm substances.
Step-by-step explanation:
https://www.slader.com/discussion/question/what-might-happen-if-a-large-cloud-in-the-sky-suddenly-encountered-a-colder-air-mass-with-a-temperat/