A visible violet light emits light with a wavelength of 4.00 x 10^-7m.
Calculate the frequency of the violet light.
6.30 x 10^-1 Hz
7.50 10^14 Hz
6.30 x 10^24
Hz
7.50 x 10^1 Hz

Protons and neutrons are found within the nucleus of an atom

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.