Pulsars: A) spin very rapidly when they're young. B) are the ...

[james9437]

Pulsars:
 
  A) spin very rapidly when they're young.
  B) are the cause of gamma-ray bursts.
  C) spin very slowly when they're young, and gradually spin faster as they age.
  D) generally form from 25 solar mass stars.
  E) emit radio in all directions.

Question 2

Relate Kepler's Second Law to the speeds of the planets.
 
  What will be an ideal response?

[raili21]

Answer to Question 1

A

Answer to Question 2

In equal time intervals, the lines that connect each of the planets to the Sun must all sweep out equal areas. The longer this line, the slower the planet could move and still sweep out this constant area. Thus more distant planets orbit the Sun more slowly, and each planet will speed up at perihelion and slow down at aphelion.

[james9437]

Thank you!

[raili21]

Always glad to help...