Niels Bohr’s theory was based on evidence from a beam of particles that scattered after hitting thin gold foil.
evidence that an atom will actually emit colors when heated.
the experimental results of other scientists.
the effect of holding a magnet next to a beam of electrons.

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

The ph is the a.independent variable b.the dependent variable c.control group