a current in a long straight wire carries a current of 2.0A. A second wire runs parallel to the first wire but is 3 cm about the first wire. what is the direction and magnitude of the current in the second wire that will just cancel the magnetic field created bu the first wire at a point 9 cm below the fire wire

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

As seen in a us weather map, the h (or high) and l (or low) symbols indicate regions where surface air pressures are high or low, respectively, compared to surrounding areas. an h is plotted where the air pressure is highest and an l is plotted where the air pressure is lowest. proceeding outward and away from the center of a high pressure system, the air pressure "

Which planets are visible without a telescope