Seyfert galaxies are spiral galaxies with active cores
a. True
b. False
Indicate whether the statement is true or false
True
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A laser beam strikes a plane reflecting surface with an angle of incidence of 37°. What is the angle between the incident ray and the reflected ray?
What will be an ideal response?
Suppose the gravitational potential energy for a mass at an altitude of one Earth radius is PE1 and at two Earth radii is PE2 . How do the absolute values of these potential energies compare?
a. |PE1| = 2|PE2| b. |PE1| = 4|PE2| c. |PE1| < 2|PE2| d. |PE1| > 2|PE2| but is not equal to 4|PE2|
Suppose I throw a ball toward the floor. The ball hits the floor and rebounds upward. What type of fundamental interaction acting between atoms in the ball and the atoms in the floor exerts the force that causes the ball to reverse its direction?
A. The strong interaction B. The electromagnetic interaction C The weak interaction D. The gravitational interaction E. Some combination of the above (specify) F. Some other kind of interaction (specify) G. One cannot determine the interaction without knowing more about inter-atomic interactions.
Which of the following is a consequence of the Sun's relatively higher temperature compared to that of the Earth
What will be an ideal response?