Paul Anka Papa Midi Sites' />Physical is used to distinguish physical capital from human capital a result of investment in the human agent, circulating capital, and financial capital. The others are natural resources including land, and labor the stock of competences embodied in the labor force. In economic theory, physical capital is one of the three primary factors of production, also known as inputs in the production function. The production function takes the general form YfK, L, where Y is the amount of output produced, K is the amount of capital stock used and L is the amount of labor used. In economics, physical capital or just capital is a factor of production or input into the process of production, consisting of machinery, buildings, computers, and the like. Paul Anka - Hold Me 'Til The Mornin' Comes Paul Anka - Goodnight My Love (Pleasant Dreams) Paul Anka - Que reste-t-il de nos amours ? / I Wish You Love Paul Anka - A Steel Guitar And A Glass Of Wine