When a satellite is a distance r from the center of the earth, the force of gravity on the satellite is f. what is the gravitational force on the satellite when it’s distance from the center of the earth is 3r? (1) f/9 (2) f/3 (3) f (4) 9f

Which bonds are found inside a water molecule

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

Name two kinds of practical electric pumps.