A 25.0kg propeller may be considered a 4.5m-long rod spun about its center. What final angular velocity does the propeller have if a torque of 1100Nm is applied for 1.2s?
A. 31 rad/s
B. 26 rad/s
C. 7.8 rad/s
D. 2.6 rad/s
A. 31 rad/s
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In 1960, ______________ proposed the concept of seafloor spreading
Fill in the blank(s) with correct word
Three small objects are positioned at the following coordinates: the 3-0 kg object at (3.0 m, 2.0 m); the 4.0-kg object at (0.0 m, -1.0 m); and the 5.0-kg object at (5.0 m, -7.0 m). What are the coordinates of the center of mass of this system?
What will be an ideal response?
Radiation of intensity 
is incident on an area perpendicular to the incoming light. The area is now rotated 20 
about an axis perpendicular to the incoming light. What is the resulting power per unit area now reaching the surface?
A. 
B. 
C. 
D. 
E. 
A object is 20 cm in front of a concave mirror, and the image is 5.0 cm in front of the mirror. What is the focal length of the mirror?
A) 0.25 cm B) 25 cm C) 6.7 cm D) 4.0 cm E) 2.1 cm