Understnding relative age of rocks use the drop-down menus to answer the questions about the diagram

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Where do magnetic lines of force enter earth?

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.