Rafi made a diagram to compare newton's universal law of gravitation with einstein's general theory of relativity. which label belongs in the area marked x? earth pulls objects toward its center. gravity causes objects to fall to the ground. the curvature of space-time pushes objects toward the ground. gravity is an attractive force in the universe.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Which transition by an electron will release the greatest amount of energy? oa ob oc od

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)