A student used a Vernier magnetic field sensor to measure the strength of the magnetic field generated by a bar magnet. At which position is the strength of the magnetic field strongest: Point A or Point B or it is the same at both points.

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.