Using the astrometric method, you discover that an a2 main sequence has a velocity of 51.120 m/s due to the presence of an exoplanet orbiting at 0.39 au. follow up observations using the radial velocity method show a star velocity of 51.112 m/s. are transit observations possible if the planet is the size of jupiter? what about size of earth?

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?