Sue observes a clear plastic, millimeter ruler under low power of her microscope. she sees three divisions of the ruler. what would be the field diameter of sue’s microscope on low power? (in micrometers ('µm')

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to: