Extrasolar planets are placed in groups by their approximate masses. What are four of these classes?
What will be an ideal response?
Question 2
In the Grand Unified Theory, the superforce was:
A) only dark energy.
B) a union of the weak and electromagnetic forces.
C) a union of all matter and energy.
D) a union of the gravitational, strong and weak nuclear, and electromagnetic forces.
E) only in effect at low energies.