A train is traveling down a straight track at 12 m/s when the engineer applies the brakes, resulting in an acceleration of -1.75 m/s2 as long as the train is in motion.
How far does the train move during a 40-s time interval starting at the instant the brakes are
applied?

What is the atomic number of an atom that has 6 protons

What is the wavelength of a 3*10^12 hz infrared wave a 3*10^20m b 1* 10^4m c 3*10^-3m d 1*10^-4 m

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.