The price of the device has been steadily increasedâby 32 percent in the past year aloneâbut not because the cost of the raw materials was increasing (a typical dose of epinephrine still costs about a dollar). The profit margin of the EpiPen was 9 percent in 2008. Today itâs 55 percent.
Frost is a form of ice and can only survive at temperatures of 32 degrees Fahrenheit and below. But that doesnât mean the measured air temperature must be 32 or below for frost to form on a surface.
Credit: Andrew Holt Photographer's Choice Getty Images. Besides an air temperature of at least 32 degrees F, frost needs humid air to form. Frost forms on objects when water vapor in the air condenses close to or on the ground. Farmers have developed ways of predicting and preventing the formation of frost on crops. They take into account different aspects of weather such as humidity, wind, clouds and the dew point to determine if there will be a frost.