The answer is C!! 100 kilometers per hour is an average speed.
Answer: Black hole.
Explanation:
As the massive star "compacts" under its own gravity, it triggers a massive supernova, after this point the remains of the star can become a neutron star, which is a very compact star made primarily, as the name says, of neutrons. The other possibility is a black hole, which is a finite region of space wherein it's interior there is a big concentration of mass, which creates a gravitational field strong enough that there is no particle that can escape it.
Helium has an atomic mass of 4.00 atomic mass units.
Answer:
It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.