Puffy cumulus clouds, which are made of water droplets, occur at lower altitudes in the atmosphere. Wispy cirrus clouds, which are made of ice crystals, occur only at higher altitudes. Find the altitude ?y (measured from sea level) above which only cirrus clouds can occur. On a typical day and at altitudes less than 11 km, the temperature at an altitude y? is given by ?T?? ?0 ?? y?, where? ?0 = 15.0°C and ??? = 6.0 C0/1000 m.
Solution 50E Step 1: Temperature at an altitude(y) T = T -0y T 0 = 15.0°C = 6.0°C/1000m Step 2: Cirrus clouds is formed only at high altitudes. Since cirrus clouds are made up of ice crystals, the temperature T must be equal to 0°C. T = 0°C