A cook grabs the handle of the frying pan and their hand gets very warm. The cook's hand gets very warm because of? conduction
radiation
convection

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Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?