An electric motor operates at 1800r/m. Find it angular velocity in radius per second.

Angular speed in radians/seconds is:

ω = 1800 r/m = 1800/60 r/s = 300*2π rad/s = 600π rad/s.

The linear speed of a point R=55mm from the axis of rotation is

V = 600π rad/s · R = 600π·55 mm = 33000 mm/s = 330 m/s.

Centripetal acceleration of a point R=55mm from the axis of rotation is

ac = ω²R = (600π)² · 55 = 19800000π mm/s² = 198000π m/s².

answer: i don't know the answer good luck

explanation:

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.