WIl mark brainliest Which example has the least kinetic energy

Question 2 options:

a 1 kg rock rolling down a hillside at 1 m/s.

a 10 kg rock rolling down a hillside at 100 m/s.

a 100 kg rock rolling down a hillside at 1 m/s.

a 100 kg rock rolling down a hillside at 100 m/s.

In apex! a liquid heated beyond a certain temperature becomes

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)