A Maglev train is powered by magnetism and electricity. A student wants to build a model of this train. Which test will best determine if the model train works?

Attach the train to an electric fan
Connect the train to a solar panel
Connect the train to an electromagnet
Connect the train to a rocket

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.