A beam of light in air is incident at an angle of 24.0° to the surface of a rectangular block of clear plastic (n = 1.46). The light beam first passes through the block and re-emerges from the opposite side into air at what angle to the normal to that surface?
a. 36°
b. 16°
c. 24.0°
d. 29°
e. 0.64°
c
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An RLC series circuit has a 400
resistance, a 2.5 mH inductor, and a capacitor. If the circuit is in resonance at 30 kHz, what is the capacitive reactance?
a. 
b. 
c. 
D. 71 
E. 0.00
How would you describe the rapid variations in CO2 on the inset graph on the right?
A) The variations occur randomly every few years. B) The variations occur randomly every few months. C) The variations occur regularly every few years. D) The variations occur regularly every year. E) The variations occur regularly every few months.
What type of motion leads to the Sun rising and setting?
a.) Earth's rotation b.) Earth's revolution c.) The Sun's revolution d.) The Sun's rotation.
The Sun lies ________ the disk of our Milky Way Galaxy.
A. about half of the way out in B. in the halo above C. about one-tenth of the way out in D. at the center of