What two things are unusual about the luminosity of the core of a Seyfert galaxy?
What will be an ideal response?
The core of a Seyfert galaxy is extremely luminous. The luminosity of the core fluctuates quickly and randomly.
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A car is traveling at 26.0 m/s when the driver suddenly applies the brakes, giving the car a constant deceleration. The car comes to a stop in a distance of 120.0 m
How fast was the car moving when it was 60.0 m past the point where the brakes were applied? A) 22.5 m/s B) 18.4 m/s C) 15.0 m/s D) 12.1 m/s E) 9.20 m/s
When a negative charge is released and moves along an electric field line, it moves to a position of
a. lower potential and lower potential energy. b. lower potential and higher potential energy. c. higher potential and lower potential energy. d. higher potential and higher potential energy. e. decreasing magnitude of the electric field.
Determine the heat transfer per unit area for pool boiling water at 200 kPa and where the surface temperature of the container is 135ºC. Compare results using Equation 10-4 to those using Equation 10-6. Assume a surface tension of 45 mN/m for water at 200 kPa.
What will be an ideal response?
A ballet dancer is spinning in the middle of a horizontal frictionless stage. Which of the following things could he change by moving parts of his body or his whole body? (There could be more than one correct choice.)
A) his total kinetic energy B) the location of his center of mass (or center of gravity) C) his angular momentum D) the horizontal component of his linear momentum E) his rotational kinetic energy F) his translational kinetic energy G) his moment of inertia