An ice skater spins at 3.5 rev/s with his arms are extended. He draws his arms in and spins at 8.3 rev/s. By what factor does his moment of inertia change in the process?
a. 2.4
c. 0.42
b. 0.58
d. 0.12
C
Physics & Space Science
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Which of these graphs would be correct for the speed of a ball thrown upward? 
A. A B. B C. C D. D
Physics & Space Science
How much energy is stored in the 50-?F capacitor when Va ? Vb = 22 V?
?
?
a.
0.78 mJ
b.
0.58 mJ
c.
0.68 mJ
d.
0.48 mJ
e.
0.22 mJ
Physics & Space Science
Why are the designs of the Hubble and Chandra Space Telescopes different?
What will be an ideal response?
Physics & Space Science
Let's say that the magnitude of a particle's displacement is 2 m. Which of the following values could represent the distance traveled?
(i) 0 m (ii) 1 m (iii) 2 m (iv) 3 m
1.(iii) and (iv) 2.(ii), (iii), and (iv) 3.(i) and (ii) 4.all of them
Physics & Space Science