Question

Question 1 Hiking up the Drakensburg mountains to Champagne Castle is a popular outdoor activity in South Afnca Mafadi is the highest mountain in the countray at 3377m Take the ground temperature to be 20 c, gas constant to be 287 jkg K and the temperature lapse rate to be 0.0065 K/m. 21 It is known that the nsk of hypothermia is significantly higher when temperatures are below freezing (Le 0°C) Are the risk of hypothermia apparent when attempting to scale Champagne Castle and at what height does the nsk start to increase? 22 The ratio of oxygen at high altude is the same as the ratio of the atmospheric pressure between that and sea level Determine the percentage of oxygen on Champagne Castle if the sea level oxygen is taken as 100% 23 Alttude sickness can start to occur if the atmospheric pressure falls below 75 kPa Determine how far up (in % of the summit height) in which hikers wil start to experience altitude sickness. (10) 25)

Answer 1

letnbe 233-273 3076 12 0. L Ta十0.0065 (h-ha) 2 326 35 [ 293、5, 26 : pescendhge t o,63.2 25 3 293十0·DD6.S ( hr ha) J

15 293 29g t O.ooss(h- La) 0.944, 210-293 12 266,92 m