Aspace probe is directly between two moons of a planet. if it is twice as far from moon a as it is from moon b, but the net force on the probe is zero, what can be said about the relative masses of the moons? a. moon a is twice as massive as moon b. b. moon a has the same mass as moon b. c. moon a is four times as massive as moon b. d. moon a is half as massive as moon b.

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)