Author Question: _____ is the energy believed to fill empty spaces and drive the acceleration of the expanding ... (Read 60 times)

Deast7027 · **on:** Jul 27, 2018

_____ is the energy believed to fill empty spaces and drive the acceleration of the expanding Universe.

A) Kinetic energy
B) Hot energy
C) Dark energy
D) Light energy

Question 2

If photons have enough energy, two photons can combine and convert their energy into a pair of particles-_____.

A) a particle of normal matter and a particle of antimatter
B) a particle of high-density matter and a particle of low-density matter
C) a particle of high mass and a particle of low mass
D) a particle of proton and a particle of neutron