A student uses a sling psychrometer to measure relative humidity. The dry bulb thermometer reads 59°F, and the wet bulb reads 41°F. What is the relative humidity?

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare