An airplanes propeller completes one revolution in 65ms. a)what is the angular speed in rpm? in rad/s?

-- We already know the rate of revolutions per time ...
it's 1 revolution per 0.065 sec.  We just have to
unit-convert that to 'per minute'.

(1 rev / 0.065 sec) x (60 sec / min) = (1 x 60) / (0.065) = 923 RPM  (rounded)


-- 1 revolution = 2π radians

  (2π rad) / (0.065 sec) = (2π / 0.065) = 96.66 rad/sec  (rounded)

This  kingdom  is  made  up of species that  do  not really easily fit into other kingdoms such as the plant, animal,and  fungi  kingdom. some protists, such as the paramecium  and  amoeba, feed  on  other  organisms  while others such as algae are able to  make their own food  through the process of photosynthesis.