A Frisbee is thrown horizontally by a student and travels in a straight line. Viewed from above, the Frisbee is seen to be in clockwise rotation. From the point of view of the student, in which direction is the angular momentum of the Frisbee while in flight?
a. The Frisbee has no angular momentum since it is moving along a straight line away from the student.
b. The direction of the angular momentum is along the line away from the student.
c. The direction of the angular momentum is toward the right since this was a right-handed throw.
d. The direction of the angular momentum is downward, perpendicular to the path of the Frisbee.
D
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The disk of the Milky Way is approximately 20,000 ly in diameter
a. True b. False Indicate whether the statement is true or false
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
When vector 
is added to vector 
, which has a magnitude of 5.0, the vector representing their sum is perpendicular to and has a magnitude that is twice that of . What is the magnitude of ?
A. 2.2
B. 2.5
C. 4.5
D. 5.0
E. 7.0
A weather balloon contains 12.0 m3 of hydrogen gas when the balloon is released from a location at which the temperature is 22.0°C and the pressure is 101 kPa The balloon rises to a location where the temperature is -30.0°C and the pressure is 20.0 kPa. If the balloon is free to expand so that the pressure of the gas inside is equal to the ambient pressure, what is the new volume of the balloon? Assume that in both cases the hydrogen gas is in thermal equilibrium with the outside air.
A) 14.0 m3 B) 2.38 m3 C) 49.9 m3 D) 82.6 m3 E) 4.16 m3
Gravity obeys an inverse square relation. This statement implies that the force due to gravity between two masses
a. will increase as the distance between the two masses increases. b. will decrease as the square of the distance between the two masses increases. c. will cause the two masses to move away from each other. d. will cause the two masses to move in a straight line. e. will cause the two masses to orbit each other.