From in a tube, a fire lit, Great heat and flames, from end emit, The force to make this fluid flow, The same will make the engine go. You push on me, I push right back, You give a blow, I’ll give a smack, What ever your force, there’s none I lack. You push on me, I push right back. When with paddle, a boat you row, What on earth, makes you go? The water and the paddle see, I push on you, you push on me. What am I?