According to the unified model of active galactic nuclei, a ____________ is observed if our line of sight is parallel to the plane of the dense disk of an active galactic nucleus
a. blazar
b. Type 1 Seyfert
c. Type 2 Seyfert
d. superluminal expansion
e. quasar
C
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Unpolarized light passes through three polarizing filters. The first one is oriented with a horizontal transmission axis, the second filter has its transmission axis 25.7° from the horizontal,
and the third one has a vertical transmission axis. What percent of the light gets through this combination of filters? A) 7.6% B) 50.0% C) 92.4% D) 0.00%
Intensity of Sound: A certain factory whistle can be heard up to a distance of 2.5 km. Assuming that the acoustic output of the whistle is uniform in all directions, how much acoustic power is emitted by the whistle? The threshold of human hearing is 1.0 × 10-12 W/m2.
A. 0.079 mW B. 0.026 mW C. 0.26 mW D. 0.79 mW E. 2.6 mW
Radiation pressure: Light with an average intensity of 683 W/m2 falls on a black surface and is completely absorbed. What is the radiation pressure that the light exerts on this surface if it strikes perpendicular to the surface? (c = 3.00 × 108 m/s)
A. 2280 nN/m2 B. 205,000 N/m2 C. 4550 nN/m2 D. 1140 nN/m2
Answer the following statement(s) true (T) or false (F)
A charged particle moving at a constant speed cannot radiate electromagnetic waves.