Lisa places a beaker of ice water on a hot plate and measures the temp of the ice water to be 0c. she turns on the hot plate and observes the ice began to melt. when half of the ice is melted she measures the temp again. which of the following is most likely? a) the temp is staying at 0c b) the temp has increased to 20c c) the temp has decreased to -20c d) the particles have stopped moving and she is unable to measure any temp

, answer fast i will give max points, !

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)