A propeller consists of two blades each 4.0 m in length and mass 126 kg each. The propeller can be approximated by a single rod rotating about its center of mass. The propeller starts from rest and rotates up to 1,180 rpm in 30 seconds at a constant rate. (Enter the magnitudes.) (a) What is the angular momentum (in kg · m2/s) of the propeller at
t = 10 s?
What is the angular momentum (in kg · m2/s) of the propeller at
t = 20 s?
kg · m2/s
(b) What is the torque (in N · m) on the propeller?

Which of the following statements is true about women and minorities in early psychology? a. in the early 20th century, numerous graduate schools recruited women and minorities to study psychology. b. opportunities in higher education were limited for women and minorities in the early 20th century due to discrimination. c. despite some obstacles, there were numerous employment opportunities for women and minorities. d. women and minorities were often selected to do academic research in an effort to make the field more diverse.

Where do magnetic lines of force enter earth?

Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?