What is spectroscopy?
A) An analysis of the way in which atoms absorb and emit light
B) A study of the geometry of rainbows
C) An observational technique to measure the brightness of light at different colors
D) The use of CCDs to capture light more efficiently than with photographic film
E) A method to freeze atmospheric turbulence for better resolution
A
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A 4.00 kg mass is moving in a circular path of radius 2.50 m with a constant angular velocity of 5.00 rad/sec. The centripetal force on the mass is
A. 250 N. B. 185 N. C. 153 N. D. 107 N. E. 94.0 N.
An airplane undergoes the following displacements: First, it flies 66 km in a direction 30° east of north. Next, it flies 49 km due south. Finally, it flies 100 km 30° north of west
Using vector components, determine how far the airplane ends up from its starting point. A) 79 km B) 81 km C) 82 km D) 78 km E) 76 km
What is the average kinetic energy per particle in 1.00 mole of an ideal gas at a pressure of 1.50 atmospheres and a temperature of 20
?
A. 
B. 
C. 
D. 
E. 
A bubble of air released from the bottom of a lake
A) rises to the top at constant volume. B) becomes smaller as it rises. C) becomes larger as it rises. D) alternately expands and contracts as it rises. E) none of the above