2-45. Which of the following statements is true 2-50. Of the following statements, which one is about the drift of pack ice? true concerning relative humidity? 1. The seasons pay a role 2. It drifts to the right of true wind in the Northern  Hemisphere 3. The actual drift is about 30° from wind direction 4. Each of the above 2-46. In the Northern Hemisphere, the speed of drifting pack ice ranges from 1.4 to 2.4 percent of wind speed. 1.    True 2.   False 2-47. Where do most icebergs originate in the northern  hemisphere? 1.    Greenland 2.   Norway 3.    Kamchatka 4.   Canada 2-48. An iceberg about the size of a truck is called 1. an iceberg 2. a bergy bit 3. a  growler 4. a medium floe 2-49. Icebergs move more by the influence of the subsurface water currents than by the influence of the winds. 1.    True 2.   False 1. 2. 3. 4. It is the ratio of water vapor in the air at different pressure levels It is the ratio of water vapor the air holds to the amount it can possibly hold It is a comparison between the actual air temperature and a standard temperature where most people feel comfortable It is an indicator for impending precipitation IN ANSWERING QUESTION 2-51, REFER TO FIGURE 1-38 IN THE TRAMAN. 2-51. What is the approximate apparent temperature if the air temperature is 90°F and the relative humidity is 80 percent? 1. 115°F 2.     105°F 3. 99°F 4. 89°F 2-52. As a General Heat Stress Index measurement, what does an apparent temperature of 101°F mean? 1. 2. 3. 4. Fatigue is possible with prolonged physical   activity Heat exhaustion or heatstroke is possible with prolonged physical activity Heat exhaustion or heatstroke is likely with prolonged physical activity Heatstroke imminent with physical activity 15