In a spectroscopic binary system, the star showing the larger blue shift is:
A) cooler and receding the fastest.
B) less massive of the pair and receding slower.
C) more massive and approaching us.
D) less massive and approaching us at this moment.
E) hotter and receding faster.
D
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Addition by 1. Components: Vector src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f15g1q20g6.jpg" style="vertical-align: -5.0px;" /> is given by
A. 2.0 m at an angle 63° north of east.
B. 2.0 m at an angle 63° east of north.
C. 6.7 m at an angle 63° east of north.
D. 6.7 m at an angle 63° north of east.
E. 3.8 m at an angle 67° north of east
has a magnitude of 8.0 m and points east, vector 
has a magnitude of 6.0 m and points north, and vector 
has a magnitude of 5.0 m and points west. The resultant vector 
+ 
+
Two projectiles are fired from ground level at equal speeds but different angles. One is fired at an angle of 30° and the other at 60°. Neglecting air resistance, the projectile to hit the ground first will be the one fired at
A) 30°. B) 60°. C) both hit at the same time
Which of the jovian planets have rings?
A) Jupiter B) Saturn C) Uranus D) Neptune E) all of the above
A hockey puck traveling at speed v on essentially frictionless ice collides elastically with one end of a straight stick lying flat on the ice. In this collision
A. momentum is conserved. B. angular momentum is conserved. C. energy is conserved. D. all of the above are conserved. E. only momentum and angular momentum are conserved.