Choose the best description of the radial velocity method of locating exoplanets. A. This method is works well for detecting planets orbiting in close proximity to a star, so the planet can more readily observed passing in front of the star.
B. The orbiting planet causes the star to wobble causing it to appear bluer or more red depending on which direction it moves.
C. Planets are timed as they orbit distant stars. The size of the planet can be judged by time duration it takes to transit a star.​

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)