A uniform ball with diameter of 10 cm rolls without slipping on a horizontal tabletop. The moment of inertia of the ball about an axis through its center is 2.2 × 10-3 kg ? m2, and the translational speed of its center is 0.45 m/s
(a) What is its angular speed of the ball about its center of mass? (b) What is the rotational kinetic energy of the ball? (c) What is the ball's angular momentum about its center of mass?
(a) 9.0 rad/s (b) 0.089 J (c) 0.020 kg ? m2/s
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Addition by 1. Components: Vector 
has a magnitude of 8.0 m and points 30° north of east; vector 
has a magnitude of 6.0 m and points 30° west of north; and vector 
has a magnitude of 5.0 m and points 30° west of south. The resultant vector 
+ 
-5.0px;" /> + 
is given by
A. 2.7 m at an angle 74° north of east.
B. 5.9 m at an angle 74° north of east.
C. 4.8 m at an angle 74° east of north.
D. 5.1 m at an angle 74° north of east.
E. 2.1 m at an angle 66° east of north.
Contrast the densities of the terrestrial and Jovian planets
What will be an ideal response?
Compared to the size of its nucleus, the size of an atom is about
A) a hundred times greater. B) ten times greater. C) one hundred thousand times greater. D) the same. E) a thousand times greater.
A container is filled with water and the pressure at the container bottom is P. If the container is instead filled with oil having a density of 0.80 that of water, what new bottom pressure results?
a. a pressure < P b. the same pressure P c. a pressure > P d. This is unable to be determined with the information given.