All of the following would be questions that could be scientifically investigated excep
a. does lack of sunlight affect plant growth?
b. will equal sizes of styrofoam and wood have the same mass?
c. what is the proper number of children to have in today's family?
d. does adding salt to water raise its boiling point?

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 happens to an isotope during radioactive decay?

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.