Which system sends nutrients to all the body's cells? excretory system nervous system circulatory system endocrine system

The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm(red) and 486 nm (blue). light from a hydrogen lamp illuminates a diffraction grating with 520lines/mm , and the light is observed on a screen 1.5m behind the grating. part a what is the distance between the first-order red and blue fringes? express your answer to two significant figures and include the appropriate units.

What is work? how much work is done to move an object 0 meters?

Which is not one of the major climate zones? question 3 options: rain forest polar tropical temperate