A person is sitting at rest on a stool that is free to rotate about a vertical axis. The person holds in one hand a bicycle wheel that spins rapidly counterclockwise (when viewed from above). The person then stops the wheel with the other hand. What happens as a result?
A. The person rotates counterclockwise (as seen from above).
B. The person rotates clockwise (as seen from above).
C. Nothing. The wheel’s angular momentum is carried away by external interactions.
D. Nothing. The wheel’s angular momentum is simply dissipated by the friction interaction.
E. Something else happens (specify).
A. The person rotates counterclockwise (as seen from above).
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What is the root mean squared velocity of the nitrogen molecules in one mole of an ideal gas at a pressure of 1.50 atmospheres and a temperature of 20
? 
A. 310 m/s B. 367 m/s C. 425 m/s D. 511 m/s E. 525 m/s
Gamma-ray bursts lasting longer than two seconds appear to be related to ______________
Fill in the blank(s) with correct word
Addition by Components: The figure shows two vectors 
and 
, along with their magnitudes and directions. The vector 
is given by 
= 
- 
-5.0px;" />.
(a) What is the magnitude of vector 
?(b) What angle does vector 
make with the +x-axis?
Fill in the blank(s) with the appropriate word(s).
Which of the following is the most common type of main-sequence star?
A) an O star B) an A star C) an F star D) an M star E) a G star