In the unified model, an accretion disk viewed from the side will cause ____ to be present in the spectrum of a Seyfert galaxy
a. narrow absorption lines
b. broad absorption lines
c. narrow spectral lines
d. broad emission lines
e. no absorption lines
c
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The angle that a swinging simple pendulum makes with the vertical obeys the equation ?(t) = (0.150 rad) cos[(2.85 rad/s)t + 1.66]. (a) What is the length of the pendulum?
A) 0.15 m B) 0.83 m C) 1.21 m D) 2.02 m E) It cannot be determined from the information given. (b) What is the mass of the swinging bob at the end of the pendulum? A) 2.85 kg B) 1.66 kg C) 0.454 kg D) 0.150 kg E) It cannot be determined from the information given. What will be an ideal response?
A wall consists of 2 layers of material: brick in front of an equal thickness of wood. If the respective thermal conductivities of the brick and wood are 1.3 J/m-s-C and 0.15 J/m-s-C,
how does the temperature gradient across the wood compare to the gradient across the brick?
Explain why in space, "no one can hear you scream."
What will be an ideal response?
A car is traveling along a freeway at 65 mph. What is the linear speed, relative to the highway, of each of the following points on one of its tires? (a) the highest point on the tire (b) the lowest point on a tire (c) the center of the tire
What will be an ideal response?