The humphreys series is a group of lines in the spectrum of atomic hydrogen. it begins at 12 368 nm and has been traced to 3281.4 nm. what are the transitions involved? what are the wavelengths of the intermediate transitions?

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

Which statement correctly describes the interaction between magnetic poles? north and south poles attract each other. north and south poles repel each other. two north poles will attract each other. two south poles will attract each other.

If frequency goes up, what happens to wavelength? does it get shorter or longer?