During winter at a particular pole on Mars, some of the carbon dioxide in the atmosphere
A) freezes out onto the surface
B) escapes into space
C) condenses into liquid on the surface
D) is destroyed by ultraviolet radiation from the Sun
A
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Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If vector
is added to vector , the result is 
. If is subtracted from 
, the result is 
. What is the direction of (to the nearest degree)?
A. 225°
B. 221°
C. 230°
D. 236°
E. 206°
A projectile is shot from the edge of a vertical cliff 60.0 m above the ocean. It has a speed of 100 m/s and is fired at an angle of 35.0° above the horizontal. How far from the foot of the vertical cliff does the projectile hit the water?
A) 126 m B) 312 m C) 684 m D) 1080 m E) 540 m
A 1.2-kg mass is projected up a rough circular track (radius = 0.80 m) as shown. The speed of the mass at point A is 8.4 m/s, and at point B, it is 5.6 m/s. What is the change in mechanical energy between A and B caused by the force of friction?
a.
?2.7 J
b.
?8.8 J
c.
?4.7 J
d.
?6.7 J
e.
?19 J
The U.S. Constitution clearly states that health is a right granted to all citizens in the United States.
a. true b. false