A machinist turns the power on to a grinding wheel, which is at rest at time t = 0.00 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 25 rad/s.
The wheel is run at that angular velocity for 37 s and then power is shut off. The wheel decelerates uniformly at 1.5 rad/s2 until the wheel stops. In this situation, the time interval of angular deceleration (slowing down) is closest to: A) 17 s
B) 15 s
C) 19 s
D) 21 s
E) 23 s
Question 2
The wave is observed in such experiments as the electron double-slit experiment is
A) a traveling disturbance in a large collection of electrons or other sub-atomic particles.
B) due to oscillations of the various sub-atomic force fields such as the strong force field.
C) a wave in an electromagnetic field.
D) a wave in a matter field.
E) due to the impact of sub-atomic particles, such as neutrinos, that randomly hit and deflect the moving electron.
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