Convert 0.00290 decigrams per milliters to nanograms per kiloliters

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Identify the electromagnets with poles that are reversed from the electromagnet shown above