A star of spectral type o lives approximately how long on the main sequence?

What are the applications of electromagnetic waves

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question