Asatellite orbiting above the earth needs no power source to keep orbiting the earth. the best explanation for this involves the law of inertia. simply put the law of inertia states a) for every force on an object that object exerts an equal and opposite force back. b) a body in motion will continue in motion unless acted upon by an outside force. c) the net force equals the mass times the acceleration of and object. d) energy cannot be created or destroyed on changed forms.

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?