If:
work done = force x distance
distance = work done ÷ force
so:
50 ÷ 2.5 = 20m
1. A) Bohr
2. D) When excited electrons return back to the ground state, a photon of light is emitted.
3. D) 10.812 amu
Hope this helps! :)
Answer: Antoine Lavoisier.
He classified the elements into four groups: elastic fluids, nonmetals, metals and earths. Some of the called elementes were not really elements (light and heat). Others were compounds, e.g. hydrochloric acid.
Heat given off by burning coal is Potential Energy and Laser Light is Kinetic Energy.
