A 3.45-kg centrifuge takes 100 s to spin up from rest to its final angular speed with constant angular acceleration.
A point located 8.00 cm from the axis of rotation of the centrifuge moves with a speed of 150 m/s when the centrifuge is at full speed.
(a) What is the angular acceleration (in rad/s2 ) of the centrifuge as it spins up?
(b) How many revolutions does the centrifuge make as it goes from rest to its final angular speed?
Question 2
A person of mass 50 kg has a de Broglie wavelength of 4.4 10-36 m while jogging. How fast is she running? (h = 6.626 10-34 J s)
A) 2.0 m/s
B) 3.0 m/s
C) 4.0 m/s
D) 5.0 m/s
For this bimolecular reaction, the rate constant k is second order
Find the final amount if the initial amount is 400 units.
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