Sediments convert to rock when they undergo
A) compaction and cementation.
B) lithification.
C) both A and B.
Answer: C
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Which statements are true about a VIRTUAL image? (There may be more than one correct choice.)
A) Its location can be calculated, but it cannot be viewed directly by your eye without using auxiliary lenses. B) It cannot be photographed. C) It cannot be viewed on a screen. D) A plane mirror always forms a virtual image. E) A concave lens always forms a virtual image.
An object travels halfway around a circle at a constant instantaneous speed 
.What is the magnitude 
of its average velocity during this time interval?
A. 
B. 1.41
C. 1.57
D./1.41
E. /1.57
A spaceship, traveling at 0.100c away from a stationary enemy station, shoots a projectile towards the station, with a speed of 0.560c relative to the spaceship. What is the speed of the projectile relative to the station?
A) 0.460c B) 0.487c C) 0.492c D) 0.492c E) 0.660c
As they move through space, the vibrating electrical and magnetic fields of a light wave must move perpendicular to each other
Indicate whether the statement is true or false