Plaque in an artery: the buildup of plaque on the walls of an artery may decrease its diameter from 0.98 cm to 0.75 cm. if the speed of the blood (rhoblood = 1060 kg/m3 ) flow was 10 cm/s before reaching the region of the plaque buildup, find the speed of the blood flow in the plaque region. assume both regions have a roughly circular cross-section

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Organelles are 1. responsible for producing power for the cell 2. tiny structures in the cell that carry out the cell's activities 3. responsible for digestion in the cell 4. found outside of the membrane

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)