On a very hot day, you decide to relax with a friend and enjoy a fruity cup of mango juice. you have ice in the cup and also a termometer-swizzle stick. as the mango juice cup cools (because of the ice), moisture suddenly starts condensing on the outside of the cup. the mango juice temperature is 20c when this happens. the air temperature is 30c. what is the dewpoint temperature? estimate the vapor pressure in the atmosphere. estimate the relative humidity in percent. why did moisture condense on the outside of the cup?