Two wires carrying equal currents exert a force on each other. (a) The current in each wire is doubled, while the distance of separation remaining constant. What is the magnitude of the force, ′, in terms of , that one wire exerts on the other?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Energy flows from the producer level to the level. is called

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above