The maximum posted speed limit on the u. s interstate highway system is found in rural areas of several western states this maximum speed is 75 mi/h or 12 km/h what is the distance in kilometers that a car a travels in if it moves continuously at this speed for 3 hours 20 minutes

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life

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)