In an electric motor, how do the electromagnet and the permanent magnets interact? A. The electric field of the permanent magnets causes the metal loop in the electromagnet to turn. B. The electromagnet causes the permanent magnets to repel each other. C. The permanent magnets reverse the current in the metal loop of the electromagnet. D. The electromagnet causes the permanent magnets to attract each other.

Asatellite that goes around the earth once every 24 hours iscalled a geosynchronous satellite. if a geosynchronoussatellite is in an equatorial orbit, its position appearsstationary with respect to a ground station, and it is known as ageostationary satellite find the radius rof the orbit of a geosynchronous satellite that circles the earth.(note that ris measured from the center of the earth, not the surface.) you mayuse the following constants: the universal gravitational constant g is 6.67 \times 10^{-11}\; {\rm n \; m^2 / kg^2}. the mass of the earth is 5.98 \times 10^{24}\; {\rm kg}. the radius of the earth is 6.38 \times 10^{6}\; {\rm m}.