The wavelengths of radiation from a star that is moving away from us
A) can be longer or shorter depending on the distance to the star
B) are shorter than if the star were not moving
C) are the same as if the star were not moving
D) are longer than if the star were not moving
D
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Comet orbits all have ________ eccentricity compared to the asteroids
Fill in the blank(s) with correct word
In a liquid, a current is set up between points A and B. Positive ions are going from A to B moving 6.0 coulombs of positive charge per second and negative charges are moving from B to A moving 2.0 coulombs of negative charge per second. What is the current from A to B?
A. 8.0 A B. -8.0 A C. 4.0 A D. -4.0 A E. 12 A
Gino says that the analog of Gauss's law for the flow of an incompressible fluid of density ? at constant velocity 
is 
for an imaginary surface within the fluid. Lorenzo says that it is true only if the area where the fluid enters the surface and the area where it leaves the surface are both perpendicular to the velocity of the fluid. Which one, if either, is correct?
a.
Gino, because as much fluid leaves as enters.
b.
Lorenzo, because is not equal to zero if the fluid enters or exits at angles other than 90°.
c.
Lorenzo, because this is true only when the fluid executes rotational motion.
d.
Gino, because it is true only when the fluid is enclosed on all sides, not when it is flowing.
e.
Lorenzo, because it is true only when the fluid is enclosed on all sides, not when it is flowing.
A 4.00 kg object is moving at 5.00 m/s NORTHWEST. It strikes a 6.00 kg that is moving SOUTHWEST at 2.00 m/s. The objects have a completely inelastic (stick together) collision. The kinetic energy lost in the collision is
A. 20.4 J. B. 28.7 J. C. 34.8 J. D. 40.2 J. E. 45.1 J.