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).
Technically the thermosphere is the layer between the mesopshere and the exosphere. the exosphere is the highest layer in the 5 layers of atmosphere. The exosphere temperature â¦ ranges are between 300 degrees to 1700 degrees Celsius, and also it contains hydrogen and helium.Now, facts about the mesosphere.it's the layer within the Earth's atmosphere that extends from about 50 to 85 km (31 to 53 mi) above the surface. The mesosphere is predominantly characterized by its thermal structure. On average, mesospheric temperature decreases with increasing height. Stratosphere: The Layer of the Atmosphere That Shields Against Ultraviolet Rays The stratosphere is a layer of the atmosphere that is often little understood outside scientific circles, though it has entered common usage through the adjective stratospheâ¦.