Barack Hussein Obama II was born on August 4, 1961, in Honolulu, Hawaii. His mother, Ann Dunham, was born on an Army base in Wichita, Kansas, during World War II. After the Japanese attack on Pearl Harbor, Dunham's father, Stanley, enlisted in the military and marched across Europe in General George Patton's army.
Best Answer: It refers to the heat change fora reaction. Means that the reaction absorbs heat from and emits heat to the environment. A delta H rxn with a positive sign means that heat is taken from the environment.Such a reaction is termed as an endothermic reaction. A delta H rxn with a negative sign means that heat is emitted or given to the environment.Such a reaction is termed as an exothermic reaction.
1 In other words, if the Rhesus antigen is present in your red blood cells, you're Rh positive (which means you have a positive blood type). 2  But if the Rh antigen is absent from your red blood cells, you're Rh negative (which means you have a negative blood type). The Rhesus antigen is a particular protein only found in the red blood cells of people with positive blood types. 2  In other words, if the Rhesus antigen is present in your red blood cells, you're Rh positive (which means you have a positive blood type).