The least massive particle of matter is now thought to be A) ...

[geodog55]

The least massive particle of matter is now thought to be
 
  A) the photon.
  B) the neutrino.
  C) the proton.
  D) the electron.
  E) the neutron.

Question 2

Jill's weight is 500 newtons. If Earth gravitationally collapses from its present radius of 6000 km down to a radius of only 600 km, Jill's weight would then be
 
  A) 50,000 newtons.
  B) 5000 newtons.
  C) 5 newtons.
  D) unchanged.
  E) 2000 newtons.

[lauravaras]

Answer to Question 1

B

Answer to Question 2

A

[geodog55]

TY

[lauravaras]

You're welcome