Tablets and cell phones emit blue light that disrupt sleep patterns when viewed before going to bed. The shortest wavelength that corresponds to blue light is 450 nm. What is the frequency of that radiation

Asample of a gaseous substance changes into a liquid

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?