Suppose you find an X-ray binary that exhibits X-ray bursts. Is it possible that the system's X-ray binary consists of a red giant and a black hole? Why or why not?
What will be an ideal response?
No, because bursts occur on a surface; a black hole has no surface.
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What astronomical period takes 18 years 11 1/3 days to complete?
a. synodic cycle b. lunar phase cycle c. eclipse season d. sidereal period e. Saros cycle
A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground. How long is the ball in flight before it hits the ground?
A) 1.22 s B) 6.79 s C) 7.45 s D) 9.14 s E) 2.44 s
If the plane of the Earth's equator were not tilted with respect to the ecliptic plane
a. the daylight period of Earth would be the same year-round. b. there would be no seasonal changes. c. Earth's poles would not experience six month long nights. d. All of the above
A 5.0-?F capacitor and a 7.0-?F capacitor are connected in series across an 8.0-V potential source. What is the potential difference across the 5.0-?F capacitor?
A) 0 V B) 8.0 V C) 2.7 V D) 3.6 V E) 4.7 V