When propane and ethanol are burned for fuel sources, what changes are happening at the atomic level? + The molecules react with oxygen to make carbon dioxide and water The molecules are turning into different atoms The atoms are turned into energy​

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.