What do we call the line that the Sun traces across the celestial sphere?
A. the extension of Earth's equator on the celestial sphere
B. the Celestial Equator
C. the ecliptic
D. the Mason-Dixon Line
Answer: C
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Visible light is an example of
A) a compression wave B) an electromagnetic wave C) a seismic wave D) a gravitational wave
An aluminum rod is 20.0 cm in length, has a diameter of 10.0 mm and is at a temperature of 20
The coefficient of linear expansion of aluminum is 
If the temperature changes to 50
then the increase in diameter of the aluminum rod is
A. 
B. 
C. 
D. 
E. 
The power dissipated in an AC series circuit increases as the phase angle approaches what value?
a. zero b. 45° c. 90° d. 180°
A simple pendulum has a mass of 0.202 kg and a length of 1.00 m. It is displaced through an angle of 31.4° and then released. After a time, the maximum angle of swing is only 10.0°. How much energy has been lost to friction?
a. 0.260 J b. 0.290 J c. 0.0301 J d. 1.00 J e. 0.320 J