Rotational Dynamics: A uniform, solid, 100-kg cylinder with a diameter of 1.0 m is mounted so it is free to rotate about fixed, horizontal, frictionless axis that passes through the centers of its circular ends. A 10-kg block is hung from a very light thin cord wrapped around the cylinder's circumference. When the block is released, the cord unwinds and the block accelerates downward, as shown in the figure. What is the acceleration of the block?
Fill in the blank(s) with the appropriate word(s).
1.6 m/s2
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A. the electric field direction.
B. the magnetic field direction.
C. the direction of 
D. perpendicular to the electric field direction.
E. None of these choices are correct.
Neptune was discovered by irregularities in the orbit of
A) Jupiter. B) Saturn. C) Uranus. D) Pluto. E) Earth.
What surgical procedure was performed on more than half of all children in the 1930s through the 1950s in the belief that the operation prevented rheumatic fever?
What will be an ideal response?
What's the Big Bang?
a. the creation of the universe b. microwave radiation from all directions in the sky c. the Hubble relation d. a punk rock band