If stars rotate with periods of tens of days, why does a neutron star rotate several to thousands of times a second?
A. When a neutron star collapses, its rotation rate speeds up because of conservation of angular momentum.
B. The collapsing neutron star becomes hot and the fast rotation is the result of thermal energy.
C. When a neutron star collapses, its rotation is kicked up by the ejected material from the supernova.
D. When a neutron star collapses, the intensified magnetic field causes it to rotate much more quickly.
Answer: A
You might also like to view...
In each of the cases (a) and (b) shown below the electric and magnetic fields in an electromagnetic wave point in the directions shown as the wave passes a certain point P. [ 
points away from the viewer in case (b).] 
In which direction is the wave moving?
A. A B. B C. C D. D E. Toward the viewer F. Away from the viewer T. This is impossible.
How can the Doppler Effect be used to determine if a storm is forming into a tornado?
What will be an ideal response?
A spaceship is traveling to the Moon. At what point is there no more gravitational force exerted on it by Earth?
A) when it gets above the atmosphere B) when it is half-way there C) when it is closer to the Moon than it is to Earth D) There is no point where there is no more gravitational force exerted on the spaceship by Earth
On the H-R diagram, the Sun lies on the ______________
Fill in the blank(s) with correct word