How do we know that pulsars must be neutron stars?
A) Pulsars have the same upper mass limit as neutron stars do.
B) No massive object, other than a neutron star, could spin as fast as we observe pulsars to spin and remain intact.
C) This is only a theory that has not yet been confirmed by observations.
D) We have observed massive-star supernovae produce pulsars.
E) Telescopic images of pulsars and neutron stars look exactly the same.
B
You might also like to view...
Three masses are positioned along the x-axis. Their masses and positions are m1 = m with x1 = 1.0 m, m2 = 2m with x2 = 2.0 m, and m3 = 9.0m with x3 = 3.0 m. What is the x-coordinate of the center of mass of this system, to the nearest tenth?
a. 4.7 m b. 2.7 m c. 2.0 m d. 0.7 m e. Not enough information
Lenz's Law is a consequence of the law of conservation of
A) mass. B) momentum. C) electric field. D) energy. E) charge.
A 50-kg satellite circles planet Cruton every 5.6 h in an orbit with a radius of 12 × 10^6 m. What is the magnitude of the gravitational force on the satellite by planet Cruton?
a. 63 N b. 58 N c. 68 N d. 73 N e. 50 N
A decade ago, many astrophysicists thought that the oldest globular clusters were 14-16 billion years old. Why did this create problems, and how did new Hubble and Hipparcos data resolve them?
What will be an ideal response?