This will vary from place to place, the American Red Cross only lets you donate once every 28 days. Private centers will let you donate up to twice in 7 days with at least one day in between. Thatâs how they come up with figures like âmake $300 a monthâ from donating plasma.
Within this layer, temperature increases as altitude increases (see temperature inversion) ; the top of the stratosphere has a temperature of about 270 K (â3 Â°C or 26.6 Â°F), just slightly below the freezing point of water.he stratosphere is layered in temperature because ozone (O 3) here absorbs high energy ultraviolet (UVB and UVC) radiation from the Sun and is broken down into the allotropes of atomic oxygen (O 1) and common molecular oxygen (O 2).
The stratosphere /ËstraetÉµsfÉªÉr/ ËstrÃ¦tÉµsfÉªÉr is the second major layer Of'earth s, atmosphere just above the, troposphere and below the. Mesosphere it is stratified in, temperature with warmer layers higher up and cooler layers farther. downhe stratosphere is layered in temperature because ozone (O 3) here absorbs high energy ultraviolet (UVB and UVC) radiation from the Sun and is broken down into the allotropes of atomic oxygen (O 1) and common molecular oxygen (O 2).