The Earth is like a magnet because a. It has a magnetic field generated from the Earth's iron core and the
spinning of the Earth.
b. It has a magnetic field generated from the Earth's crust and the
spinning of the Earth.
c. It has a magnetic pole generated from the Earth’s iron core.
d. It has a magnetic field generated from the Earth's gravity.

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?

Asystematic approach to problem solving is called a (an)

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity