The rock is heavy because the mass changes from 10.0kg to 100.0kg in 3.24 seconds
I believe the answer is the first one you listed,
Hope this helps..
<span>The answer is cysteine. This is a half essential proteinogenic amino acid with the formulation of HO₂CCHCH₂SH. It is prearranged by the codons UGU and UGC. The thiol side chain in cysteine frequently partakes in enzymatic responses, as a nucleophile.</span>
Synchroniser switch is in the "on" position.
