were working (OR were at work in , delete repeated word "at" - stylistic improvement but NOT the assignment!) fell lost received had dropped lifted...
1 Answers · Education & Reference · 15/07/2020
C. Nothing but gravity holds a neutron star together. It wouldn't have the gravity needed to compress it at so small a size. Beta decay would convert the neutrons to protons and electrons.
8 Answers · Science & Mathematics · 06/08/2020