5. A tape attached to an accelerating trolley passes through a ticker that makes dots on it at a frequency of 50Hz The ticker timer makes 10 dots on a 10cm long tape such that, the distance a between the
first two dots is 0.5cm and the distance b between the last two dots is 1 5cm
(a)Determine the velocity of the trolley at:
I Distance a
II Distance b
Determine the acceleration of the trolley.
(6) State with a reason what would be observed on the spacing between the dots on the tape when
the trolley is made to move on a horizontal surface.
al velocity Y in time the distance
illo Y To the​

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)

The solid that is formed and usually sinks to the bottom of a solution is the

Calculate the volume of this regular solid. what is the volume of the cone? round your answer to the nearest hundredth