Slanting Surfaces With Friction: A 50.0-kg block is being pulled up a 16.0° slope by a force of 250 N that is parallel to the slope. The coefficient of kinetic friction between the block and the slope is 0.200. What is the acceleration of the block?
A. 0.528 m/s2
B. 0.158 m/s2
C. 0.412 m/s2
D. 0.983 m/s2
E. 0.260 m/s2
Answer: C
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A. 1.0 m B. 1.5 m C. 0.10 m D. 9.8 m E. 2.4 m
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Radio waves are reflected by layers in the ______________
Fill in the blank(s) with correct word
A sample of 
has a mass of 50.0 grams. What is number of molecules of carbon dioxide in the 50.0 gram sample? (C = 12.0u, O = 16.0u)
A. 
B. 
C. 
D. 
E. 