Give the change in internal energy of a system if (a) (b) or(c)
Obama’s DNC Address On behalf of the great state of Illinois... (APPLAUSE) ... crossroads of a nation, land of Lincoln, let me express my deep gratitude for the privilege of addressing this convention. Tonight is a particular honor for me because, let's face it, my presence on this stage is pretty unlikely. My father was a foreign student, born and raised in a small village in Kenya. He grew up herding goats, went to school in a tin- roof shack. His father, my grandfather, was a cook, a domestic servant to the British. OBAMA: But my grandfather had larger dreams for his son. Through hard work and perseverance my father got a scholarship to study in a magical place, America, that's shown as a beacon of freedom and opportunity to so many who had come before him. (APPLAUSE) While studyi
