Nitrogen (n2) initially at 40°f and 14.7 lbf/in.2 fills a closed, rigid, 6.5-ft3 tank fitted with a paddle wheel. during a process, the paddle wheel provides 5 btu of energy transfer by work to the gas. the gas temperature reaches 80°f at the end of the process. assuming ideal gas behavior, determine the mass of nitrogen, in lb, and the heat transfer, in btu. kinetic and potential energy effects can be ignored.

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation