If you were able to make a 3 dimensional model of magnetic force, using a magnet and magnetic field lines, which 2 characteristics might your model have? a) The arrows on the field lines would point from the magnet's south pole to its north pole. b) The field lines would cross paths between one pole of the magnet and the other pole. c) the field lines would exist all around the magnet. d) the field lines near the magnet would be close together.

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.