When discussing the earth's magnetic field we could say that the earth has a

geomagnetic north pole that is similar to the north pole of a magnet.

geomagnetic north pole that is similar to the south pole of a magnet.

magnetic core that has a charge similar to the south pole of a magnet.

random collection of magnetic poles dispersed in different locations.

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.