The hypernova model of the collapse of the core of a massive star may describe
A. the gravitational collapse of a protostar prior to the main sequence phase
B. the feeding of material into a quasar
C. a neutron star
D. a relatively long gamma ray burst
E. a black hole
Ans: D. a relatively long gamma ray burst
You might also like to view...
A 10-g bullet moving horizontally with a speed of 2.0 km/s strikes and passes through a 4.0-kg block moving with a speed of 4.2 m/s in the opposite direction on a horizontal frictionless surface. If the block is brought to rest by the collision, what is the kinetic energy of the bullet as it emerges from the block?
a. 0.51 kJ b. 0.29 kJ c. 0.80 kJ d. 0.13 kJ e. 20 kJ
A vibrating guitar string has exactly one antinode in the middle of the string and two nodes at the end. You have produced an oscillation of the string at its
A. second harmonic frequency. B. fundamental frequency. C. first harmonic frequency. D. third harmonic frequency.
If the amount of polar ice decreases, what would happen, and why?
A) cooling, because melted ice cools things off B) warming, because more sunlight is reflected C) cooling, because more sunlight is reflected D) warming, because more sunlight is absorbed
Due to the temperature and atmospheric conditions of Titan, scientists hypothesize that Titan may have rivers, lakes and possibly an ocean of ____
a. liquid water b. metallic hydrogen c. frozen carbon dioxide d. liquid methane e. liquid nitrogen